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Fencer Vulns
medium 5.5

CVE-2002-0793 json

Hard link and possibly symbolic link following vulnerabilities in QNX RTOS 4.25 (aka QNX4) allow local users to overwrite arbitrary files v…

published 2002-07-26 24 y ago modified 2026-06-16 4 mo ago also EUVD-2002-0785

cvss
5.5
version 3.1, 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
3
Exploit-DB

Summary

Hard link and possibly symbolic link following vulnerabilities in QNX RTOS 4.25 (aka QNX4) allow local users to overwrite arbitrary files via (1) the -f argument to the monitor utility, (2) the -d argument to dumper, (3) the -c argument to crttrap, or (4) using the Watcom sample utility.

Patch / fix

Timeline

  1. First public exploit (EDB-21501)
  2. Published

Exploit prediction

1.34% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21501 QNX RTOS 4.25 - dumper Arbitrary File Modification local, 2002-05-31
  • EDB-21500 QNX RTOS 4.25 - monitor Arbitrary File Modification local, 2002-05-31
  • EDB-21499 QNX RTOS 4.25 - 'CRTTrap' File Disclosure local, 2002-05-31
  • securityfocus.com http://www.securityfocus.com/bid/4902 referenced PoC, tagged "exploit" by a source, unverified
  • archives.neohapsis.com http://archives.neohapsis.com/archives/bugtraq/2002-05/0292.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-59 Improper Link Resolution Before File Access

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.