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.

Published: 2001-05-03 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-0191 is rated High Risk (76.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 5.50%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.31% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2001-0191

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.19% 5.50% +4.31%
2 2025-03-30 2.28% 1.19% -1.09%
3 2025-03-29 — 2.28% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-0191

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2001-0191

OS Trackers for CVE-2001-0191

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2001-0191

Affected software / configurations for CVE-2001-0191

Vendor Product Version Raw CPE
andynorman gnuserv < 3.12 cpe:2.3:a:andynorman:gnuserv:*:*:*:*:*:*:*:*

References for CVE-2001-0191

cvelogic Threat Intelligence