CVE-2009-3677 is a critical authentication bypass vulnerability affecting the Internet Authentication Service (IAS) in various Microsoft Windows operating systems, including Windows 2000, XP, Server 2003, Vista, and Server 2008. This flaw allows remote, unauthenticated attackers to gain unauthorized access to network resources by sending a malformed MS-CHAP v2 PEAP authentication request, bypassing credential verification. With a CVSS score of 10.0, the vulnerability presents a severe risk, enabling complete compromise of confidentiality, integrity, and availability. Despite its high severity and EPSS score, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
All Versions ImpactedCPE matchmatch criteria | cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:* | ||
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_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:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
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.
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 records are not available for this CVE.