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Full vulnerability report · 2025
CVE-2025-49706High confidence

Microsoft SharePoint Improper Authentication Vulnerability

Microsoft · SharePoint

6.5MediumCVSS 3.1
Recommended action
Patch now

CISA confirms exploitation in the wild and lists 2025-07-23 as the remediation due date.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Critical, raised 2 bands.upgradedsince 22 Jul 2025

Evidence used

  • CISA confirms exploitation in the wild.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 99.08% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Microsoft SharePoint and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 3 daysRemediation target: Within 90 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-20552

CISA KEV mirrored by ENISA

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

EUVD state
Present in the current official mapping
Known exploitation
Recorded by ENISA since 22 Jul 2025. Evidence sources: cisa_kev.
ENISA score
6.5 · CVSS 3.1
Advisory evidence
3 linked advisory records
Explicit mitigation evidence

Only statements that explicitly mention a fix, patch, update, workaround or mitigation are shown here.

  • csaf_ncscnl · NCSC-2025-0215Kwetsbaarheden verholpen in Microsoft Office
Recommended actionPatch now

CISA confirms exploitation in the wild and lists 2025-07-23 as the remediation due date.

Patch available
01

What, why and how

Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. CVE-2025-53771 is a patch bypass for CVE-2025-49706, and the updates for CVE-2025-53771 include more robust protection than those for CVE-2025-49706.

What

Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. CVE-2025-53771 is a patch bypass for CVE-2025-49706, and the updates for CVE-2025-53771 include more robust protection than those for CVE-2025-49706.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. CVE-2025-53771 is a patch bypass for CVE-2025-49706, and the updates for CVE-2025-53771 include more robust protection than those for CVE-2025-49706.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

02

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 2025-07-22. Known ransomware campaign use is recorded.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Authentication → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
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-287 ↗

CWE-287: Improper Authentication. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:F/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-287CISA KEV
A

Official authority intelligence

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

ENISA EUVD · EUVD-2025-20552Known-exploited evidence recorded

Improper authentication in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.

Official EUVD record ↗
BSI · German · WID-SEC-2025-1491Microsoft Office: Mehrere Schwachstellen

Ein entfernter, authentisierter Angreifer oder ein lokaler Angreifer kann mehrere Schwachstellen in Microsoft Excel 2016, Microsoft PowerPoint 2016, Microsoft Word 2016, Microsoft Office 2016, Microsoft Outlook 2016, Microsoft Office Online Server, Microsoft SharePoint, Microsoft Office 2019, Microsoft SharePoint Server 2019, Microsoft 365 Apps, Microsoft Teams und Microsoft Office ausnutzen, um Administratorrechte zu erlangen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, Sicherheitsmaßnahmen zu umgehen und Spoofing-Angriffe durchzuführen.

Official advisory ↗
Canadian Centre for Cyber Security · English · AL25-009AL25-009 - Vulnerability impacting Microsoft SharePoint Server (CVE-2025-53770, CVE-2025-49704, CVE-2025-53771, CVE-2025-49706 and CVE-2025-49712) – Update 4

An Alert is used to raise awareness of a recently identified cyber threat that may impact cyber information assets, and to provide additional detection and mitigation advice to recipients. The Canadian Centre for Cyber Security ("Cyber Centre") is also available to provide additional assistance regarding the content of this Alert to recipients as requested.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0579Multiples vulnérabilités dans les produits Microsoft

De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2025-009558マイクロソフトの Microsoft SharePoint Server および SharePoint Enterprise Server におけるなりすまされる脆弱性

マイクロソフトの Microsoft SharePoint Server および SharePoint Enterprise Server には、なりすまされる脆弱性が存在します。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6556MS 8월 보안 위협에 따른 정기 보안 업데이트 권고

취약성 | | Windows KDC Proxy Service (KPSSVC) | CVE-2025-49735 | Windows KDC 프록시 서비스(KPSSVC) 원격 코드 실행 취약성 | | Windows Win32K - ICOMP | CVE-2025-49733 | Win32k 권한 상승 취약성 | | SQL Server | CVE-2025-49719 | Microsoft SQL Server 정보 유출 취약성 | | SQL Server | CVE-2025-49718 | Microsoft SQL Server 정보 유출 취약성 | | SQL Server | CVE-2025-49717 | Microsoft SQL Server 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2025-49712 | Microsoft SharePoint 원격 코드 실행 취약성 | | Microsoft Office Excel | CVE-2025-49711 | Microsoft Excel 원격 코드 실행 취약성 | | Azure Virtual Machines | CVE-2025-49707 | Azure Virtual Machines Spoofing Vulnerability | | Microsoft Office SharePoint | CVE-2025-49706 | Microsoft SharePoint Server 스푸핑 취약성 | | Microsoft Office PowerPoint | CVE-2025-49705 | Microsoft PowerPoint 원격 코드 실행 취약성 | | Microsoft Office Word | CVE-2025-49703 | Microsoft Word 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49702 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49699 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office Word | CVE-2025-49698 | Microsoft Word 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49697 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49696 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49695 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office Excel | C

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6540美 CISA 발표 주요 Exploit 정보공유(Update. 2025-07-22)

#### 美 CISA 발표 주요 Exploit 정보공유(Update. 2025-07-22)2025-07-22 현재 자주 악용되고 있는 취약점 목록으로, 취약한 버전의 SW를 사용 중인 경우 긴급 패치를 권고 드립니다. * 참조 링크 : https://www.cisa.gov/known-exploited-vulnerabilities-catalog | cveID | vendorProject | vulnerabilityName | dateAdded | shortDescription | requiredAction | dueDate | | --- | --- | --- | --- | --- | --- | --- | | CVE-2025-49706 | Microsoft | Microsoft SharePoint Improper Authentication Vulnerability | 2025-07-22 | Microsoft SharePoint contains an improper authentication vulnerability that allows an authorized attacker to perform spoofing over a network. Successfully exploitation could allow an attacker to view sensitive information and make some changes to disclosed information. This vulnerability could be chained with CVE-2025-49704. The update for CVE-2025-53771 includes more robust protections than the update for CVE-2025-49706. | CISA recommends disconnecting public-facing versions of SharePoint Server that have reached their end-of-life (EOL) or end-of-service

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6528MS 7월 보안 위협에 따른 정기 보안 업데이트 권고

| Microsoft SQL Server 정보 유출 취약성 | | SQL Server | CVE-2025-49718 | Microsoft SQL Server 정보 유출 취약성 | | SQL Server | CVE-2025-49717 | Microsoft SQL Server 원격 코드 실행 취약성 | | Windows Netlogon | CVE-2025-49716 | Windows Netlogon 서비스 거부 취약성 | | Dynamics 365 FastTrack Implementation Assets | CVE-2025-49715 | Dynamics 365 FastTrack 구현 자산 정보 공개 취약성 | | Visual Studio Code - Python extension | CVE-2025-49714 | Visual Studio Code Python 확장 원격 코드 실행 취약성 | | Microsoft Edge (Chromium-based) | CVE-2025-49713 | Microsoft Edge(Chromium 기반) 원격 코드 실행 취약성 | | Microsoft Office Excel | CVE-2025-49711 | Microsoft Excel 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2025-49706 | Microsoft SharePoint Server 스푸핑 취약성 | | Microsoft Office PowerPoint | CVE-2025-49705 | Microsoft PowerPoint 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2025-49704 | Microsoft SharePoint 원격 코드 실행 취약성 | | Microsoft Office Word | CVE-2025-49703 | Microsoft Word 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49702 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office SharePoint | CVE-2025-49701 | Microsoft SharePoint 원격 코드 실행 취약성 | | Microsoft Office Word | CVE-2025-49700 | Microsoft Word 원격 코드 실행 취약성 | | Microsoft Office | CVE-2025-49699 | Microsoft Office 원격 코드 실행 취약성 | | Microsoft Office Word | CVE-2025-49698 | Microsoft Word 원격 코드 실행 취

Official advisory ↗
NCSC-NL · Dutch · NCSC-2025-0215Kwetsbaarheden verholpen in Microsoft Office

Een kwaadwillende kan de kwetsbaarheden misbruiken om zich verhoogde rechten toe te kennen, willekeurige code uit te voeren of toegang krijgen tot gevoelige gegevens. Voor succesvol misbruik moet de kwaadwillende het slachtoffer misleiden een malafide bestand te openen of link te volgen. **UPDATE**: Het NCSC ontvangt meldingen dat de kwetsbaarheden met kenmerk CVE-2025-49704 en CVE-2025-49706 actief worden misbruikt. Deze kwetsbaarheden stellen een kwaadwillende in staat om zich voor te doen als andere gebruiker en willekeurige code uit te voeren, mogelijk met verhoogde rechten. Er is (nog) geen publieke exploitcode bekend en misbruik vindt plaats op publiek toegankelijke sharepoint-installaties. Doordat de kwetsbaarheid de aandacht heeft van onderzoekers en de (toen nog theoretische) mogelijkheid van misbruik is gedemonstreerd tijdens Pwn2Own 2025 Berlijn, verwacht het NCSC een significante toename in pogingen tot misbruik. Voor succesvol misbruik moet de kwaadwillende het slachtoffer misleiden een malafide link te volgen, waarna de kwaadwillende onder de rechten van het slachtoffer code kan uitvoeren. ``` Microsoft Teams: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-49731 | 3.10 | Verkrijgen van verhoogde rechten | | CVE-2025-49737 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Office: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-47994 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2025-49695 | 8.40 | Uitvoeren van willekeurige code | | CVE-2025-49696 | 8.40 | Uitvoeren van willekeurige code | | CVE-2025-49697 | 8.40 | Uitvoeren van willekeurige code | | CVE-2025-49699 | 7.00 | Uitvoeren van willekeurige code | | CVE-2025-49702 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Office Word: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-49698 | 7.80 | Uitvoeren van willekeurige code | | CVE-2025-49700 | 7.80 | Uitvoeren van willekeurige code | | CVE-2025-49703 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Office PowerPoint: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-49705 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Microsoft Office SharePoint: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-49701 | 8.80 | Uitvoeren van willekeurige code | | CVE-2025-49704 | 8.80 | Uitvoeren van willekeurige code | | CVE-2025-49706 | 6.30 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| Microsoft Office Excel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2025-48812 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2025-49711 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| ```

Official advisory ↗
03

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
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
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 8 Jul 2025 · Last source change 4 Aug 2026, 03:55 UTC · CWE-287 · Improper Authentication

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-2025-20552
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 ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: cyber.gc.ca/al25-009-vulnerability-impacting-microsoft-sharepoint-server-cve-2025-53770.
    Before
    remediation: cyber.gc.ca/al25-009-vulnerability-impacting-microsoft-sharepoint-server-cve-2025-53770 · vendor advisory: microsoft.com/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities · vendor advisory: msrc.microsoft.com/CVE-2025-49706
    After
    vendor advisory: microsoft.com/disrupting-active-exploitation-of-on-premises-sharepoint-vulnerabilities · vendor advisory: msrc.microsoft.com/CVE-2025-49706
    secure@microsoft.com ↗
  2. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    16.0.0 < 16.0.5508.1000; 16.0.0 < 16.0.10417.20027; 16.0.0 < 16.0.18526.20424 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Microsoft SharePoint Enterprise Server 2016: 16.0.0 < 16.0.5508.1000; Microsoft SharePoint Server 2019: 16.0.0 < 16.0.10417.20027; Microsoft SharePoint Server Subscription Edition: 16.0.0 < 16.0.18526.20424 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    Canadian Centre for Cyber Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Added to CISA KEV
Remediation guidance recorded
ENISA EUVD · EUVD-2025-20552↗Canadian Centre for Cyber Security remediation guidance↗CISA KEV record↗CVE authority or vendor reference↗Vendor advisory↗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.
Free version - for non-commercial use only.CVE-2025-49706 · cve.blacktree.nl