CVE-2009-4831: n/a vulnerability

CVE-2009-4831: Cerulean Studios Trillian 3.1 Basic does not check SSL certificates during MSN authentication, which allows...

Cerulean Studios Trillian 3.1 Basic does not check SSL certificates during MSN authentication, which allows remote attackers to obtain MSN credentials via a man-in-the-middle attack with a spoofed SSL certificate.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 07:17 UTC (UTC+00:00)

Security readout for executives and security teams

Trillian 3.1 Basic did not verify SSL certificates during MSN login. A network attacker who could intercept traffic could impersonate the service and capture MSN credentials. Business urgency mainly depends on whether this legacy client or related MSN authentication use still exists. Exposure is likely limited to legacy systems still running Trillian 3.1 Basic and using MSN authentication. Modern environments are unlikely to be affected unless old messaging clients remain installed or accessible. Treat as a targeted legacy exposure issue, not a broad enterprise emergency. Prioritize discovery and retirement of affected clients because the impact is credential theft if the vulnerable workflow still exists. Mitigation focus: Inventory endpoints for Trillian 3.1 Basic or related legacy messaging clients.; Check Cerulean Studios or trusted vendor guidance for any historical fixes or upgrade paths.; Remove or disable unsupported legacy clients where business use is no longer required..

Prepared: Jun 28, 2026, 02:49 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 29, 2010, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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2Source links

CVSS and timeline data

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Source materials

CVE List V5 sourceCVE List V5
trillian-ssl-security-bypass(51400)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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CWE details

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