CVE-2003-0258: n/a vulnerability

CVE-2003-0258: Cisco VPN 3000 series concentrators and Cisco VPN 3002 Hardware Client 3.5.x through 4.0.REL, when enabling...

Cisco VPN 3000 series concentrators and Cisco VPN 3002 Hardware Client 3.5.x through 4.0.REL, when enabling IPSec over TCP for a port on the concentrator, allow remote attackers to reach the private network without authentication.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 01:50 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw affects legacy Cisco VPN 3000 concentrators and VPN 3002 Hardware Client software when IPSec over TCP is enabled. A remote attacker may reach the private network without authenticating, which undermines the VPN boundary. Exposure is likely limited to organizations still running these legacy Cisco VPN platforms with the affected software range and IPSec over TCP enabled on reachable concentrator ports. Treat as high priority only if these legacy Cisco VPN devices remain in service. The business risk is unauthorized network entry through an exposed VPN perimeter control. Mitigation focus: Inventory Cisco VPN 3000 concentrators and VPN 3002 Hardware Clients.; Confirm whether software is 3.5.x through 4.0.REL.; Identify concentrator ports with IPSec over TCP enabled..

Prepared: Jun 30, 2026, 11:12 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 8, 2003, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
cisco-vpn-unauth-access(11954)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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