CVE-2002-0853

Cisco Virtual Private Network (VPN) Client 3.5.4 and earlier allows remote attackers to cause a denial of service (CPU consumption) via a packet with a zero-length payload.

Published: 2002-09-05 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-0853 is rated Moderate Risk (48.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.15%). 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-2002-0853

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 1.64% 2.15% +0.52%
2 2025-08-03 0.68% 1.64% +0.95%
3 2025-03-30 — 0.68% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-0853

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-0853

Affected software / configurations for CVE-2002-0853

Vendor Product Version Raw CPE
cisco vpn_client 3.5.1 cpe:2.3:a:cisco:vpn_client:3.5.1:*:linux:*:*:*:*:*
cisco vpn_client 3.5.1 cpe:2.3:a:cisco:vpn_client:3.5.1:*:mac_os_x:*:*:*:*:*
cisco vpn_client 3.5.1 cpe:2.3:a:cisco:vpn_client:3.5.1:*:solaris:*:*:*:*:*
cisco vpn_client 3.5.1 cpe:2.3:a:cisco:vpn_client:3.5.1:*:windows:*:*:*:*:*
cisco vpn_client 3.5.2 cpe:2.3:a:cisco:vpn_client:3.5.2:*:linux:*:*:*:*:*
cisco vpn_client 3.5.2 cpe:2.3:a:cisco:vpn_client:3.5.2:*:mac_os_x:*:*:*:*:*
cisco vpn_client 3.5.2 cpe:2.3:a:cisco:vpn_client:3.5.2:*:solaris:*:*:*:*:*
cisco vpn_client 3.5.2 cpe:2.3:a:cisco:vpn_client:3.5.2:*:windows:*:*:*:*:*

References for CVE-2002-0853

cvelogic Threat Intelligence