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CVE-2010-2566

35
FAUCET Score

CVE-2010-2566 is a critical remote code execution vulnerability affecting Microsoft Windows XP SP2/SP3 and Windows Server 2003 SP2. It stems from improper validation of certificate request messages within the SChannel security package, allowing malicious TLS/SSL servers to execute arbitrary code via a crafted SSL response. With a CVSS score of 9.3, this vulnerability is highly severe, requiring no authentication and having a medium attack complexity, but resulting in complete compromise of confidentiality, integrity, and availability. Despite its age and severity, there is no public exploit code available, it is not listed in CISA's KEV catalog, and it has received no community discussion or media coverage, indicating a lack of active exploitation or public awareness.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_2003_server:*:sp2:itanium:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
15.29%
Probability of exploitation in next 30 days
EPSS Percentile
96.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1529 is in the 81st percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2010/ms10-049
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11787
us-cert.gov / cas/techalerts/TA10-222A.html
US Government Resource