CVE-2017-0269: The Microsoft Server Message Block 1.0 (SMBv1) allows denial of service when an attacker sends specially crafted requests to the server, aka "Windows SMB Denial of Service Vulnerability"

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

What, why and how

The Microsoft Server Message Block 1.0 (SMBv1) allows denial of service when an attacker sends specially crafted requests to the server, aka "Windows SMB Denial of Service Vulnerability". This CVE ID is unique from CVE-2017-0273 and CVE-2017-0280.

What

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

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 Input Validation → disrupt the affected service
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: High: exploitation depends on specific conditions
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-20 ↗
CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.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.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
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.

NetworkUnauthenticatedDenial of serviceCWE-20

Official authority intelligence

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

ENISA EUVD · EUVD-2017-0625Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

Canadian Centre for Cyber Security · English · AV17-063Microsoft security updates

ces: CVE-2017-0190, CVE-2017-0224, CVE-2017-0077, CVE-2017-0242, CVE-2017-0243, CVE-2017-0244, CVE-2017-0245, CVE-2017-0246, CVE-2017-0248, CVE-2017-0254, CVE-2017-0255, CVE-2017-0258, CVE-2017-0259, CVE-2017-0261, CVE-2017-0262, CVE-2017-0263, CVE-2017-0064, CVE-2017-0171, CVE-2017-0175, CVE-2017-0212, CVE-2017-0213, CVE-2017-0214, CVE-2017-0220, CVE-2017-0221, CVE-2017-0222, CVE-2017-0226, CVE-2017-0227, CVE-2017-0229, CVE-2017-0228, CVE-2017-0230, CVE-2017-0231, CVE-2017-0233, CVE-2017-0234, CVE-2017-0235, CVE-2017-0236, CVE-2017-0238, CVE-2017-0240, CVE-2017-0241, CVE-2017-0264, CVE-2017-0265, CVE-2017-0266, CVE-2017-0267, CVE-2017-0268, CVE-2017-0269, CVE-2017-0270, CVE-2017-0271, CVE-2017-0272, CVE-2017-0273, CVE-2017-0274, CVE-2017-0275, CVE-2017-0276, CVE-2017-0277, CVE-2017-0278, CVE-2017-0279, CVE-2017-0280, CVE-2017-0281. Suggested Action CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly. References: https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/bc365363-f51e-e711-80da-000d3a32fc99

Official advisory ↗

CERT-FR · French · CERTFR-2017-AVI-148Multiples vulnérabilités dans Microsoft Windows

.cve.org/CVERecord?id=CVE-2017-0242 Référence CVE CVE-2017-0244 https://www.cve.org/CVERecord?id=CVE-2017-0244 Référence CVE CVE-2017-0245 https://www.cve.org/CVERecord?id=CVE-2017-0245 Référence CVE CVE-2017-0246 https://www.cve.org/CVERecord?id=CVE-2017-0246 Référence CVE CVE-2017-0258 https://www.cve.org/CVERecord?id=CVE-2017-0258 Référence CVE CVE-2017-0259 https://www.cve.org/CVERecord?id=CVE-2017-0259 Référence CVE CVE-2017-0263 https://www.cve.org/CVERecord?id=CVE-2017-0263 Référence CVE CVE-2017-0267 https://www.cve.org/CVERecord?id=CVE-2017-0267 Référence CVE CVE-2017-0268 https://www.cve.org/CVERecord?id=CVE-2017-0268 Référence CVE CVE-2017-0269 https://www.cve.org/CVERecord?id=CVE-2017-0269 Référence CVE CVE-2017-0270 https://www.cve.org/CVERecord?id=CVE-2017-0270 Référence CVE CVE-2017-0271 https://www.cve.org/CVERecord?id=CVE-2017-0271 Référence CVE CVE-2017-0272 https://www.cve.org/CVERecord?id=CVE-2017-0272 Référence CVE CVE-2017-0273 https://www.cve.org/CVERecord?id=CVE-2017-0273 Référence CVE CVE-2017-0274 https://www.cve.org/CVERecord?id=CVE-2017-0274 Référence CVE CVE-2017-0275 https://www.cve.org/CVERecord?id=CVE-2017-0275 Référence CVE CVE-2017-0276 https://www.cve.org/CVERecord?id=CVE-2017-0276 Référence CVE CVE-2017-0277 https://www.cve.org/CVERecord?id=CVE-2017-0277 Ré

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2017-003405Microsoft Server Message Block におけるサービス運用妨害 (DoS) の脆弱性

Microsoft Server Message Block 1.0 (SMBv1) には、サービス運用妨害 (DoS) 状態にされる脆弱性が存在します。ベンダは、本脆弱性を「Windows SMB のサービス拒否の脆弱性」として公開しています。本脆弱性は、CVE-2017-0269 および CVE-2017-0273 とは異なる脆弱性です。

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2017-003397Microsoft Server Message Block におけるサービス運用妨害 (DoS) の脆弱性

Microsoft Server Message Block 1.0 (SMBv1) には、サービス運用妨害 (DoS) 状態にされる脆弱性が存在します。ベンダは、本脆弱性を「Windows SMB のサービス拒否の脆弱性」として公開しています。本脆弱性は、CVE-2017-0269 および CVE-2017-0280 とは異なる脆弱性です。

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2017-003395Microsoft Server Message Block におけるサービス運用妨害 (DoS) の脆弱性

Microsoft Server Message Block 1.0 (SMBv1) には、サービス運用妨害 (DoS) 状態にされる脆弱性が存在します。ベンダは、本脆弱性を「Windows SMB のサービス拒否の脆弱性」として公開しています。本脆弱性は、CVE-2017-0273 および CVE-2017-0280 とは異なる脆弱性です。

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: Server Block Message 1.0: Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.
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.

Evidence and provenance

Published 12 May 2017 · Last source change 5 Aug 2024, 13:03 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.1

CVSS sourceNIST NVD

EPSS source

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

FIRST · tracked since 2026-09-01

European sourceENISA EUVD · EUVD-2017-0625

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceNIST NVD

NVD statusNVD modified after enrichment

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

Material change intelligence

What changed after publication

View recent updates ↗

5 Aug 2024, 13:03 UTC
Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to authoritative remediation link · patch.
Before
no authoritative guidance recorded
After
authoritative remediation link · patch
af854a3a-2127-422b-91ae-364da2661108 ↗
5 Aug 2024, 13:03 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016. · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016. · 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 ↗
5 Aug 2024, 13:03 UTC
Remediation statusRemediation status changed from Awaiting fix to Patch available.
Before
Awaiting fix
After
Patch available
af854a3a-2127-422b-91ae-364da2661108 ↗
5 Aug 2024, 13:03 UTC
SeveritySeverity changed from Unknown to Medium.
Before
Unknown
After
Medium
NIST NVD ↗
5 Aug 2024, 13:03 UTC
CVSS scoreCVSS score changed from not recorded to 5.9 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).
Before
not recorded
After
5.9 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
NIST NVD ↗
1 Sept 2026, 02:42 UTC
ENISA EUVD mappingEUVD-2017-0625 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2017-0625"}
ENISA EUVD ↗
5 Aug 2024, 13:03 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗

2017-05-12CVE published

2024-08-05Fixed release or patch reference recorded

ENISA EUVD · EUVD-2017-0625↗CVE authority or vendor 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.

The Microsoft Server Message Block 1.0 (SMBv1) allows denial of service when an attacker sends specially crafted requests to the server, aka "Windows SMB Denial of Service Vulnerability"

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

ENISA European Vulnerability Database

EUVD-2017-0625

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication

The Microsoft Server Message Block 1.0 (SMBv1) allows denial of service when an attacker sends specially crafted requests to the server, aka "Windows SMB Denial of Service Vulnerability"

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

EUVD-2017-0625

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

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