How severe is CVE-2002-0853?

CVE-2002-0853 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2002-0853 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-0853?

CVE-2002-0853 primarily affects Cisco Vpn Client. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2002-0853?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2002-0853 published?

CVE-2002-0853 was published on 2002-09-05 and last updated on 2026-06-16.

CVE-2002-0853

CVE-2002-0853 is a medium-severity vulnerability in Cisco Vpn Client with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Vpn Client
Published: 2002-09-05
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2002-0853?: CVE-2002-0853 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2002-0853 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0853?: CVE-2002-0853 primarily affects Cisco Vpn Client. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2002-0853?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-0853 published?: CVE-2002-0853 was published on 2002-09-05 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:cisco:vpn_client:3.5.1:*:linux:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.1:*:mac_os_x:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.1:*:solaris:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.1:*:windows:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.2:*:linux:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.2:*:mac_os_x:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.2:*:solaris:*:*:*:*:*
cpe:2.3:a:cisco:vpn_client:3.5.2:*:windows:*:*:*:*:*

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