CVE-2025-24985: Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability

Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2025-04-01 as the remediation due date.

Patch available

What, why and how

Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.

What

Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.

Why

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code locally.

Why

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

Confirmed in the wild

CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2025-03-11.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path: local access → Heap-based Buffer Overflow → execute code or commands in the affected security context
Attack surface: Local
Privileges required: None: unauthenticated exploitation is possible
User interaction: Required interaction required
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-122 ↗
CWE-122: Heap-based Buffer Overflow. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.

UnauthenticatedRemote code executionCWE-122CISA KEVPublic exploit reference

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2025-6321Known-exploited evidence recorded

Integer overflow or wraparound in Windows Fast FAT Driver allows an unauthorized attacker to execute code locally.

Official EUVD record ↗

BSI · German · WID-SEC-2025-0537Microsoft Windows/Windows Server: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Microsoft Windows Server, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows 10, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows, Microsoft Windows Server 2022 und Microsoft Windows 11 ausnutzen, um beliebigen Programmcode auszuführen, seine Rechte zu erweitern, zu spoofen, Sicherheitsmaßnahmen zu umgehen, Informationen offenzulegen oder einen Denial of Service auszulösen .

Official advisory ↗

Canadian Centre for Cyber Security · English · AV25-130Microsoft security advisory – March 2025 monthly rollup (AV25–130)

On March 11, 2025, Microsoft published security advisories to address vulnerabilities in multiple products. Included were critical updates for the following products: Microsoft has indicated that CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993 and CVE-2025-26633 have been exploited.

Official advisory ↗

Cyber Security Agency of Singapore · English · CSA-SB-20250312Security Bulletin 12 Mar 2025

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 12 Mar 2025, published on 12 March 2025. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗

CERT-FR · French · CERTFR-2025-AVI-0193Multiples vulnérabilités dans Microsoft Windows

é Microsoft Windows CVE-2025-24064 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24066 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24067 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24071 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24072 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24076 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24084 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24983 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24984 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24985 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24987 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24988 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24991 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24992 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24993 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24994 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24995 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24996 du 11 mars 2025 Bulletin de sécurité Microsoft Windows CVE-2025-24997 du 11 mars 2025 Bul

Official advisory ↗

NBSZ-NKI · Hungarian · cve-2025-24985CVE-2025-24985

Magas

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2025-002435マイクロソフトの複数の Microsoft Windows 製品におけるの整数オーバーフローまたはラップアラウンド脆弱性

マイクロソフトの Microsoft Windows 10、Windows 11、Windows Server には、Windows FAST FAT ファイルシステムドライバに不備があるため、整数オーバーフローまたはラップアラウンドの脆弱性が存在します。

Official advisory ↗

KISA KrCERT/CC · Korean · KNVD-6408MS 3월 보안 위협에 따른 정기 보안 업데이트 권고

Official advisory ↗

KISA KrCERT/CC · Korean · KNVD-6404美 CISA 발표 주요 Exploit 정보공유(Update. 2025-03-11)

Microsoft Windows Fast FAT File System Driver contains an integer overflow or wraparound vulnerability that allows an unauthorized attacker to execute code with a physical attack.

Official advisory ↗

NCSC-NL · Dutch · NCSC-2025-0078Kwetsbaarheden verholpen in Microsoft Windows

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: - Denial-of-Service (DoS) - Omzeilen van beveiligingsmaatregel - Uitvoer van willekeurige code (root/adminrechten) - Uitvoer van willekeurige code (Gebruikersrechten) - Verkrijgen van verhoogde rechten - Toegang tot gevoelige gegevens - Voordoen als andere gebruiker Van de kwetsbaarheden met kenmerk CVE-2025-24983, CVE-2025-24984, CVE-2025-24985, CVE-2025-24991, CVE-2025-24993 en CVE-2025-26633 geeft Microsoft aan informatie te hebben dat deze eerder actief zijn misbruikt als Zeroday. Er is geen publieke Proof-of-Concept (PoC) of exploitcode bekend. De kwetsbaarheden zijn uitsluitend lokaal te misbruiken. Grootschalig actief misbruik wordt hierdoor niet waarschijnlijk geacht. ``` Windows Kernel-Mode Drivers: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24066 | 8.40 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Remote Desktop Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-26645 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Kernel Streaming WOW Thunk Service Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24995 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows USB Video Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24987 | 6.60 | Verkrijgen van verhoogde rechten | | CVE-2025-24988 | 6.60 | Verkrijgen van verhoogde rechten | | CVE-2025-24055 | 4.30 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Routing and Remote Access Service (RRAS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24051 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Role: DNS Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24064 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Management Console: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-26633 | 7.00 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows exFAT File System: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-21180 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Cross Device Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24076 | 7.30 | Verkrijgen van verhoogde rechten | | CVE-2025-24994 | 7.30 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Fast FAT Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24985 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Windows: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2024-9157 | onb. | Verkrijgen van verhoogde rechten | | CVE-2025-25008 | 7.10 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Mark of the Web (MOTW): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24061 | 7.80 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Win32 Kernel Subsystem: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24044 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-24983 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Kernel Memory: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24997 | 4.40 | Denial-of-Service | |----------------|------|-------------------------------------| Microsoft Local Security Authority Server (lsasrv): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24072 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Streaming Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24046 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-24067 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Telephony Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24056 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows NTLM: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24996 | 6.50 | Voordoen als andere gebruiker | | CVE-2025-24054 | 6.50 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| Windows MapUrlToZone: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-21247 | 4.30 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Common Log File System Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24059 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hyper-V: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24048 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-24050 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Remote Desktop Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24035 | 8.10 | Uitvoeren van willekeurige code | | CVE-2025-24045 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Subsystem for Linux: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24084 | 8.40 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows File Explorer: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24071 | 7.50 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| Windows NTFS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-24984 | 4.60 | Toegang tot gevoelige gegevens | | CVE-2025-24991 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-24992 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-24993 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| ```

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.7876
Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.3476
Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.25368
Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.22470
Windows Server 2008 Service Pack 2: 6.0.6003.0 < 6.0.6003.23168
Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.7876
Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.7009
Windows 11 version 22H2: 10.0.22621.0 < 10.0.22621.5039
Windows Server 2012: 6.2.9200.0 < 6.2.9200.25368
Windows Server 2016: 10.0.14393.0 < 10.0.14393.7876
Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.20947
Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.7009
Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.5039
Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.3476
Windows Server 2019: 10.0.17763.0 < 10.0.17763.7009
Windows Server 2008 R2 Service Pack 1 (Server Core installation): 6.1.7601.0 < 6.1.7601.27618
Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.22470
Windows 11 version 22H3: 10.0.22631.0 < 10.0.22631.5039
Windows Server 2022, 23H2 Edition (Server Core installation): 10.0.25398.0 < 10.0.25398.1486
Windows Server 2022: 10.0.20348.0 < 10.0.20348.3328
Windows Server 2025: 10.0.26100.0 < 10.0.26100.3476
Windows Server 2008 Service Pack 2 (Server Core installation): 6.0.6003.0 < 6.0.6003.23168
Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.5608
Windows Server 2008 R2 Service Pack 1: 6.1.7601.0 < 6.1.7601.27618
Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.5608
Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.

Official vendor articles12 stored documents

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

March 11, 2025—KB5053618 (OS Build 10240.20947) - EXPIRED | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Nov 2026March 11, 2025—KB5053618 (OS Build 10240.20947) - EXPIRED Applies To Windows 10 Note Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work,
March 11, 2025—KB5053627 (Security-only update) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 14 Nov 2026March 11, 2025—KB5053627 (Security-only update) Applies To Windows Server 2008 R2 Premium Assurance End of support information Windows Server 2008 R2 Premium Assurance ended on January 13, 2026. Windows Server 2008 R2 Extended Security Updates (ESU) ended on January 10, 2023. Additionally, Extended Security Updates o
March 11, 2025—KB5053888 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053888 (Monthly Rollup) Applies To Windows Server 2008 Premium Assurance End of support information Windows Server 2008 Premium Assurance ended on January 13, 2026. Windows Server 2008 Extended Security Updates (ESU) ended on January 10, 2023. Additionally, Extended Security Updates on Azure only su
March 11, 2025—KB5053995 (Security-only update) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053995 (Security-only update) Applies To Windows Server 2008 Premium Assurance End of support information Windows Server 2008 Premium Assurance ended on January 13, 2026. Windows Server 2008 Extended Security Updates (ESU) ended on January 10, 2023. Additionally, Extended Security Updates on Azure o
March 11, 2025—KB5053594 (OS Build 14393.7876) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053594 (OS Build 14393.7876) Applies To Windows 10, version 1607, all editions Windows Server 2016, all editions Note Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or secu
March 11, 2025—KB5053596 (OS Build 17763.7009) - EXPIRED | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053596 (OS Build 17763.7009) - EXPIRED Applies To Win 10 Ent LTSC 2019 Win 10 IoT Ent LTSC 2019 Windows 10 IoT Core LTSC Windows Server 2019 Note EXPIRATION NOTICE IMPORTANT  As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We reco
March 11, 2025—KB5053602 (OS Builds 22621.5039 and 22631.5039) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053602 (OS Builds 22621.5039 and 22631.5039) Applies To Windows 11 Enterprise and Education, version 22H2 Windows 11 version 23H2, all editions For information about Windows update terminology, see types of Windows updates and the monthly quality update types . To find an overview of Windows 11, v
March 11, 2025—KB5053603 (OS Build 20348.3328) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053603 (OS Build 20348.3328) Applies To Windows Server 2022 For information about Windows update terminology, see types of Windows updates and the monthly quality update types . To find an overview of Windows Server 2022, see its update history page . Follow @WindowsUpdate to find out when new conte
March 11, 2025—KB5053606 (OS Builds 19044.5608 and 19045.5608) - EXPIRED | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053606 (OS Builds 19044.5608 and 19045.5608) - EXPIRED Applies To Windows 10 Enterprise LTSC 2021 Windows 10 IoT Enterprise LTSC 2021 Windows 10, version 22H2, all editions EXPIRATION NOTICE IMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other
March 11, 2025—KB5053620 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053620 (Monthly Rollup) Applies To Windows Server 2008 R2 Premium Assurance End of support information Windows Server 2008 R2 Premium Assurance ended on January 13, 2026. Windows Server 2008 R2 Extended Security Updates (ESU) ended on January 10, 2023. Additionally, Extended Security Updates on Azur
March 11, 2025—KB5053886 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053886 (Monthly Rollup) Applies To Windows Server 2012 ESU Important The installation of this Extended Security Update (ESU) might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012. For a successful installation, please make sure all Subset of endpoint
March 11, 2025—KB5053887 (Monthly Rollup) | Microsoft Support →Original publisher ↗Searchable text snapshot · Captured 4 Nov 2026March 11, 2025—KB5053887 (Monthly Rollup) Applies To Windows Server 2012 R2 ESU Important The installation of this Extended Security Update (ESU) might fail when you try to install it on an Azure Arc-enabled device that is running Windows Server 2012 R2. For a successful installation, please make sure all Subset of en

Evidence and provenance

Published 11 Mar 2025 · Last source change 26 Feb 2026, 19:09 UTC · CWE-122 · Heap-based Buffer Overflow

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2025-6321

Product sourceCISA KEV

Remediation sourceCVE/CNA references

CWE sourceOther authority

NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

27 Aug 2026, 11:05 UTC
BlackTree coverageBlackTree article coverage changed from no BlackTree article to 1 BlackTree article.
Before
no BlackTree article
After
1 BlackTree article
BlackTree editorial ↗
26 Feb 2026, 19:09 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
10.0.10240.0 < 10.0.10240.20947; 10.0.14393.0 < 10.0.14393.7876; 10.0.17763.0 < 10.0.17763.7009; 10.0.19044.0 < 10.0.19044.5608; 10.0.19045.0 < 10.0.19045.5608; 10.0.22621.0 < 10.0.22621.5039; 10.0.22631.0 < 10.0.22631.5039 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
After
Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.20947; Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.7876; Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.7009; Windows 10 Version 21H2: 10.0.19044.0 < 10.0.19044.5608; Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.5608; Windows 11 version 22H2: 10.0.22621.0 < 10.0.22621.5039; Windows 11 version 22H3: 10.0.22631.0 < 10.0.22631.5039; Windows 11 Version 23H2: 10.0.22631.0 < 10.0.22631.5039; Windows 11 Version 24H2: 10.0.26100.0 < 10.0.26100.3476; Windows Server 2008 R2 Service Pack 1: 6.1.7601.0 < 6.1.7601.27618; Windows Server 2008 R2 Service Pack 1 (Server Core installation): 6.1.7601.0 < 6.1.7601.27618; Windows Server 2008 Service Pack 2: 6.0.6003.0 < 6.0.6003.23168; Windows Server 2008 Service Pack 2 (Server Core installation): 6.0.6003.0 < 6.0.6003.23168; Windows Server 2012: 6.2.9200.0 < 6.2.9200.25368; Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.25368; Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.22470; Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.22470; Windows Server 2016: 10.0.14393.0 < 10.0.14393.7876; Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.7876; Windows Server 2019: 10.0.17763.0 < 10.0.17763.7009; Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.7009; Windows Server 2022: 10.0.20348.0 < 10.0.20348.3328; Windows Server 2022, 23H2 Edition (Server Core installation): 10.0.25398.0 < 10.0.25398.1486; Windows Server 2025: 10.0.26100.0 < 10.0.26100.3476; Windows Server 2025 (Server Core installation): 10.0.26100.0 < 10.0.26100.3476 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
CNA ↗

2025-03-11CVE published

2025-03-11Added to CISA KEV

2026-02-26Fixed release or patch reference recorded

ENISA EUVD · EUVD-2025-6321↗CISA KEV record↗CVE authority or vendor reference↗Mitigation reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability

Published severity in operational context

Evidence used

Compensating controls

Verification

National CERT insights
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CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2025-6321

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication