Vulnerability Database

308,379

Total vulnerabilities in the database

CVE-2002-1336

TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

  • Published: Dec 11, 2002
  • Updated: Nov 9, 2025
  • CVE: CVE-2002-1336
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

No CWE or OWASP classifications available.

Software From Fixed in
tightvnc / tightvnc 1.2.4 1.2.4.x
tightvnc / tightvnc 1.2.0 1.2.0.x
tightvnc / tightvnc 1.2.1 1.2.1.x
tightvnc / tightvnc 1.2.3 1.2.3.x
tightvnc / tightvnc 1.2.5 1.2.5.x