Vulnerability Report

CVE-2001-1422

Title: WinVNC predictable challenge allows authentication bypass by replay

Other

Proof Of Concept

No public PoC currently indexed for CVE-2001-1422.

CWE Category NVD-CWE-noinfo

Published Date Jan 23, 2001

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 7.5 CVSS v2.0

Exploit Probability (EPSS)

2.06%

Vulnerability Summary

CVE-2001-1422: 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.

Impacted Vendors

att 1

Reference Links

http://www.kb.cert.org/vuls/id/303080 http://www.securityfocus.com/bid/2275 http://www1.corest.com/common/showdoc.php?idxseccion=10&idx=117 https://exchange.xforce.ibmcloud.com/vulnerabilities/5992 http://www.kb.cert.org/vuls/id/303080 http://www.securityfocus.com/bid/2275 http://www1.corest.com/common/showdoc.php?idxseccion=10&idx=117 https://exchange.xforce.ibmcloud.com/vulnerabilities/5992

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2001-1422 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 03, 2025 MODIFIED

Vulnerability data or affected products updated.

January 23, 2001 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A

Complexity N/A

Privileges N/A

Interaction NONE

CVSS Vector String


                                    AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected Stack

No specific products linked.