How severe is CVE-2011-1496?

CVE-2011-1496 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-2011-1496 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1496?

CVE-2011-1496 primarily affects Nicholas Marriott Tmux. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1496?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1496 published?

CVE-2011-1496 was published on 2011-04-18 and last updated on 2026-06-16.

CVE-2011-1496

CVE-2011-1496 is a medium-severity vulnerability in Nicholas Marriott Tmux with a CVSS 2.0 base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 4.6)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Nicholas Marriott Tmux
Published: 2011-04-18
Last modified: 2026-06-16

Description

tmux 1.3 and 1.4 does not properly drop group privileges, which allows local users to gain utmp group privileges via a filename to the -S command-line option.

Frequently asked questions

What is CVE-2011-1496?: tmux 1.3 and 1.4 does not properly drop group privileges, which allows local users to gain utmp group privileges via a filename to the -S command-line option.
How severe is CVE-2011-1496?: CVE-2011-1496 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-2011-1496 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1496?: CVE-2011-1496 primarily affects Nicholas Marriott Tmux. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1496?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1496 published?: CVE-2011-1496 was published on 2011-04-18 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:nicholas_marriott:tmux:1.3:*:*:*:*:*:*:*
cpe:2.3:a:nicholas_marriott:tmux:1.4:*:*:*:*:*:*:*

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