How severe is CVE-2014-3121?

CVE-2014-3121 has a CVSS 2.0 base score of 7.6, rated high severity.

Is CVE-2014-3121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-3121?

CVE-2014-3121 primarily affects Marc Lehmann Rxvt-unicode. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-3121?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2014-3121 published?

CVE-2014-3121 was published on 2014-05-14 and last updated on 2026-06-17.

CVE-2014-3121

CVE-2014-3121 is a high-severity vulnerability in Marc Lehmann Rxvt-unicode with a CVSS 2.0 base score of 7.6. 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-78.

Key facts

Severity: High (CVSS 2.0 base score 7.6)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Marc Lehmann Rxvt-unicode
Published: 2014-05-14
Last modified: 2026-06-17

Description

rxvt-unicode before 9.20 does not properly handle OSC escape sequences, which allows user-assisted remote attackers to manipulate arbitrary X window properties and execute arbitrary commands.

Frequently asked questions

What is CVE-2014-3121?: rxvt-unicode before 9.20 does not properly handle OSC escape sequences, which allows user-assisted remote attackers to manipulate arbitrary X window properties and execute arbitrary commands.
How severe is CVE-2014-3121?: CVE-2014-3121 has a CVSS 2.0 base score of 7.6, rated high severity.
Is CVE-2014-3121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-3121?: CVE-2014-3121 primarily affects Marc Lehmann Rxvt-unicode. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-3121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2014-3121 published?: CVE-2014-3121 was published on 2014-05-14 and last updated on 2026-06-17.

References

Affected products (17)

cpe:2.3:a:marc_lehmann:rxvt-unicode:*:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.0:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.01:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.02:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.05:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.06:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.07:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.08:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.09:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.10:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.11:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.12:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.14:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.15:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.16:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.17:*:*:*:*:*:*:*
cpe:2.3:a:marc_lehmann:rxvt-unicode:9.18:*:*:*:*:*:*:*

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