Is CVE-2009-0647 being actively exploited?

CVE-2009-0647 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-0647?

CVE-2009-0647 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2009-0647

MEDIUM · CVSS 5.0EPSS 17.4%EU EUVD

msnmsgr.exe in Windows Live Messenger (WLM) 2009 build 14.0.8064.206, and other 14.0.8064.x builds, allows remote attackers to cause a denial of service (application crash) via a modified header in a packet, as possibly demonstrated by a UTF-8.0 value of the charset field in the Content-Type header line. NOTE: this has been reported as a format string vulnerability by some sources, but the provenance of that information is unknown.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-20
EPSS score: 17.4% (97th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-0650)
Published: February 19, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-0650 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / windows live messenger

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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