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TI-2008-03643 Aliases CVE-2008-3803GHSA-2wcv-w38q-52h8

A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching…

Priority LOW 28Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

A "logic error" in Cisco IOS 12.0 through 12.4, when a Multiprotocol Label Switching (MPLS) VPN with extended communities is configured, sometimes causes a corrupted route target (RT) to be used, which allows remote attackers to read traffic from other VPNs in opportunistic circumstances.

Why it matters now

EPSS 0.02647 85th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*12.0sVulnerableCisco
cpe:2.3:o:cisco:ios:12.0sx:*:*:*:*:*:*:*12.0sxVulnerableCisco
cpe:2.3:o:cisco:ios:12.0sz:*:*:*:*:*:*:*12.0szVulnerableCisco
  • cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:* Versions 12.0s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0sx:*:*:*:*:*:*:* Versions 12.0sx Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios:12.0sz:*:*:*:*:*:*:* Versions 12.0sz Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2008-3803
  2. 2026-10-03 Alias added: GHSA-2wcv-w38q-52h8

References

Advisory 2

Other 1

  • TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
  • TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
See all 617 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences