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Fencer Vulns
high 7.2

CVE-1999-0040 json

Buffer overflow in Xt library of X Windowing System allows local users to execute commands with root privileges.

published 1997-05-01 29 y ago modified 2026-06-16 4 mo ago also EUVD-1999-0040

cvss
7.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
5
Exploit-DB

Summary

Buffer overflow in Xt library of X Windowing System allows local users to execute commands with root privileges.

Timeline

  1. First public exploit (EDB-322)
  2. Published

Exploit prediction

1.23% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-19202 BSD/OS 2.1 / Caldera UnixWare 7/7.1.0 / FreeBSD 1.1.5.1/2.0 / HP HP-UX 10.34 / IBM AIX 4.2 / SGI IRIX 6.3 / SunOS 4.1.4 - 'libXt Library' Local Overflow / Local Privilege Escalation (3) local, 1997-08-25
  • EDB-19201 BSD/OS 2.1 / Caldera UnixWare 7/7.1.0 / FreeBSD 1.1.5.1/2.0 / HP HP-UX 10.34 / IBM AIX 4.2 / SGI IRIX 6.3 / SunOS 4.1.4 - 'libXt Library' Local Overflow / Local Privilege Escalation (2) local, 1997-08-25
  • EDB-19200 BSD/OS 2.1 / Caldera UnixWare 7/7.1.0 / FreeBSD 1.1.5.1/2.0 / HP HP-UX 10.34 / IBM AIX 4.2 / SGI IRIX 6.3 / SunOS 4.1.4 - 'libXt Library' Local Overflow / Local Privilege Escalation (1) local, 1997-08-25
  • EDB-331 LibXt - 'XtAppInitialize()' Local Overflow *xterm local, 1997-05-14
  • EDB-322 Xt Library - Local Privilege Escalation local, 1996-08-24

CVSS scores

assigned by version score vector
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.