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CVE-2009-2526

74
FAUCET Score

CVE-2009-2526 describes an infinite loop denial-of-service vulnerability in Microsoft Windows Vista and Server 2008. The flaw stems from improper validation of SMBv2 packet fields, allowing a remote, unauthenticated attacker to cause a system hang by sending a specially crafted packet to the Server service. With a CVSS score of 7.8 (high), this vulnerability is easily exploitable over the network with low attack complexity, leading to a complete loss of system availability. While not listed on CISA's KEV catalog, exploit code for related issues in the srv2.sys component exists on ExploitDB, though direct exploitation of this specific infinite loop vulnerability is not explicitly detailed. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
81.89%
Probability of exploitation in next 30 days
EPSS Percentile
99.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-40280 · Feb 26, 2016
This CVE's current EPSS score of 0.8189 is in the 100th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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/2009/ms09-050
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5595
us-cert.gov / cas/techalerts/TA09-286A.html
US Government Resource