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TI-2001-01374 Aliases CVE-2001-1422GHSA-hf8p-xhgf-8g9v

WinVNC 3.3.3 and earlier generates the same challenge string for multiple connections…

Priority LOW 37Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

WinVNC 3.3.3 and earlier 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.

Why it matters now

EPSS 0.02064 81st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:att:winvnc:*:*:*:*:*:*:*:*up to 3.3.3VulnerableAT&T
  • cpe:2.3:a:att:winvnc:*:*:*:*:*:*:*:* Versions up to 3.3.3 Vulnerable ·AT&T

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2001-1422
  2. 2026-10-03 Alias added: GHSA-hf8p-xhgf-8g9v

References

Advisory 2

  • TI-2001-00166 Buffer overflow in AT&T WinVNC (Virtual Network Computing) server 3.3.3r7 and earlier… CVSS 2.0HIGH 10.0
  • TI-2001-00165 Buffer overflow in AT&T WinVNC (Virtual Network Computing) client 3.3.3r7 and earlier… CVSS 2.0HIGH 7.6
  • TI-2000-01152 WinVNC installs the WinVNC3 registry key with permissions that give Special Access (read… CVSS 2.0HIGH 9.0

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences