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.

Published: 2002-10-04 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-1106 is rated Moderate Risk (50.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.95%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2002-1106

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.36% 0.95% +0.59%
2 2023-03-07 1.14% 0.36% -0.78%
3 2022-02-04 — 1.14% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-1106

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2002-1106

Affected software / configurations for CVE-2002-1106

Vendor Product Version Raw CPE
cisco vpn_client 2.0 cpe:2.3:a:cisco:vpn_client:2.0:*:windows:*:*:*:*:*
cisco vpn_client 3.0 cpe:2.3:a:cisco:vpn_client:3.0:*:windows:*:*:*:*:*
cisco vpn_client 3.1 cpe:2.3:a:cisco:vpn_client:3.1:*:windows:*:*:*:*:*
cisco vpn_client 3.5.1 cpe:2.3:a:cisco:vpn_client:3.5.1:*:windows:*:*:*:*:*

References for CVE-2002-1106

cvelogic Threat Intelligence