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Fencer Vulns
medium 4.6

CVE-2006-5556 json

Buffer overflow in the localtime_r function, and certain other functions, in libc in HP-UX B.11.11 and possibly other versions allows local…

published 2006-10-27 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-5541

cvss
4.6
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 71%
public exploits
1
Exploit-DB

Summary

Buffer overflow in the localtime_r function, and certain other functions, in libc in HP-UX B.11.11 and possibly other versions allows local users to execute arbitrary code via a long TZ environment variable.

Patch / fix

Timeline

  1. First public exploit (EDB-2636)
  2. Published

Exploit prediction

1.33% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-2636 HP-UX 11i - 'LIBC TZ' Enviroment Variable Privilege Escalation local, 2006-10-24
  • securityfocus.com http://www.securityfocus.com/bid/20718 referenced PoC, tagged "exploit" by a source, unverified
  • blogs.23.nu http://blogs.23.nu/prdelka/stories/13144/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

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.