CVE-2002-1106 — Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match those of the certificate from the VPN Concentrator, which allows remote attackers to conduct man-in-the-middle attacks

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HIGH

Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match those of the certificate from the VPN Concentrator, which allows remote attackers to conduct man-in-the-middle attacks

Published Sep 1, 2004

7.5

HIGH

CVSS 2.0

EPSS 0.95%

Description

Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match those of the certificate from the VPN Concentrator, which allows remote attackers to conduct man-in-the-middle attacks.

Affected products

Remediation

No remediation recorded yet.

Metrics

0.95% 0.00951

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00951

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.95% (0.00951)	59.89th	v5 (v2026.06.15)
Jun 15, 2026	0.95% (0.00951)	56.52th	v5 (v2026.06.15)
Mar 17, 2025	0.39% (0.00387)	57.76th	v4 (v2025.03.14)
Dec 12, 2024	0.36% (0.00360)	73.11th	v3 (v2023.03.01)
Feb 8, 2024	0.36% (0.00360)	71.44th	v3 (v2023.03.01)
Mar 7, 2023	0.36% (0.00360)	67.82th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (0)

No CWE recorded.

References (3)

http://www.cisco.com/warp/public/707/vpnclient-multiple2-vuln-pub.shtml
vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securityfocus.com/bid/5652
vdb-entryx_refsource_BIDVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/10045
vdb-entryx_refsource_XF

Link	Providers	Tags
http://www.cisco.com/warp/public/707/vpnclient-multiple2-vuln-pub.shtml		vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securityfocus.com/bid/5652		vdb-entryx_refsource_BIDVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/10045		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Sep 1, 2004

Updated Aug 8, 2024

Reserved Sep 6, 2002

Link CVE-2002-1106

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2002-1106

Red Hat

Severity n/a

Public date n/a

Links CVE-2002-1106