The SMB client in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 does not properly allocate memory for SMB responses, which allows remote SMB servers and man-in-the-middle attackers to execute arbitrary code via a crafted (1) SMBv1 or (2) SMBv2 response, aka "SMB Client Memory Allocation Vulnerability."
CVE-2010-0269
- No confirmed exploitation signals yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EPSS
- 97.9%
- KEV
- Not listed
Published
April 14, 2010
Last Modified
April 29, 2026
References (8)
- secure@microsofthttp://secunia.com/advisories/39372
- secure@microsofthttp://www.us-cert.gov/cas/techalerts/TA10-103A.html
- secure@microsofthttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020
- secure@microsofthttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7129
- af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/39372
- af854a3a-2127-422b-91ae-364da2661108http://www.us-cert.gov/cas/techalerts/TA10-103A.html
- af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-020
- af854a3a-2127-422b-91ae-364da2661108https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7129
Data Freshness Timeline
(refreshed 3× in last 7d / 30× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-05 02:26 UTCEPSS rescore
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- 2026-06-12 23:08 UTCEPSS rescore
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- 2026-05-29 12:01 UTCEG score recompute
- 2026-05-29 12:01 UTCGHSA enrichment
- 2026-05-28 13:42 UTCEPSS rescore
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- 2026-05-18 21:29 UTCEPSS rescore
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Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- Exploit-DBEDB-12273✓ verifiedFirst seen Apr 17, 2010
Microsoft Windows 7/2008 R2 - SMB Client Trans2 Stack Overflow (MS10-020) (PoC)
Open source ↗
Frequently asked(4)
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Dependency Blast Radius
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