Is CVE-2008-3803 being actively exploited?

CVE-2008-3803 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2008-3803?

CVE-2008-3803 has a CVSS 2.0 base score of 5.1 (MEDIUM).

CVE-2008-3803

MEDIUM · CVSS 5.1EPSS 2.6%EU EUVD

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.

Key facts

CVSS score: 5.1 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:H/Au:N/C:P/I:P/A:P
EPSS score: 2.6% (86th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2008-3789)
Published: September 26, 2008
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2008-3789 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

cisco / ios
cisco / ios
cisco / ios

References

http://secunia.com/advisories/31990(Third Party Advisory)
http://www.cisco.com/en/US/products/products_security_advisory09186a0080a014a9.shtml(Vendor Advisory)
http://www.securityfocus.com/bid/31366(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id?1020940(Broken Link, Third Party Advisory, VDB Entry)
http://www.vupen.com/english/advisories/2008/2670(Permissions Required)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5919(Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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