How severe is CVE-2001-0191?

CVE-2001-0191 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2001-0191 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0191?

CVE-2001-0191 affects Andynorman Gnuserv. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0191?

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

When was CVE-2001-0191 published?

CVE-2001-0191 was published on 2001-05-03 and last updated on 2026-06-16.

CVE-2001-0191

CVE-2001-0191 is a critical-severity vulnerability in Andynorman Gnuserv with a CVSS 2.0 base score of 10.0. 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-120.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Andynorman Gnuserv
Published: 2001-05-03
Last modified: 2026-06-16

Description

gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or brute force authentication by using a short cookie length.

Frequently asked questions

What is CVE-2001-0191?: gnuserv before 3.12, as shipped with XEmacs, does not properly check the specified length of an X Windows MIT-MAGIC-COOKIE cookie, which allows remote attackers to execute arbitrary commands via a buffer overflow, or brute force authentication by using a short cookie length.
How severe is CVE-2001-0191?: CVE-2001-0191 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2001-0191 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0191?: CVE-2001-0191 affects Andynorman Gnuserv. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0191?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2001-0191 published?: CVE-2001-0191 was published on 2001-05-03 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:andynorman:gnuserv:*:*:*:*:*:*:*:*

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