Is CVE-2011-1091 in the CISA KEV catalog?

No. CVE-2011-1091 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2011-1091?

CVE-2011-1091 has a CVSS v2 base score of 4.0 (MEDIUM).

What is the EPSS score for CVE-2011-1091?

CVE-2011-1091 has an EPSS score of 3.01% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2011-1091?

Upgrade pidgin on debian 11 to 2.7.11-1 or later.

CVE & CISA-KEV Catalog

CVE-2011-1091

MEDIUMEPSS 86th pctl

4.0

CVSS v2

NVD

Description

libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG SMS message.

How to fix

Remediation Available

pidginDebian

Fixed in:2.7.11-1CVE-2011-1091

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

3.01%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.