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CVE-2008-3803

18
FAUCET Score

CVE-2008-3803 describes a logic error in Cisco IOS versions 12.0 through 12.4, specifically impacting configurations with Multiprotocol Label Switching (MPLS) VPNs utilizing extended communities. This flaw can lead to the use of a corrupted route target, potentially allowing remote attackers to opportunistically read traffic from other VPNs. The vulnerability has a CVSS score of 5.1, indicating a network-based attack with high complexity, resulting in partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.0sCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.0s:*:*:*:*:*:*:*
12.0sxCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.0sx:*:*:*:*:*:*:*
12.0szCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.0sz:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.1MEDIUM

AV:N/AC:H/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.65%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0265 is in the 75th percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/31990
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5919
Third Party Advisory
cisco.com / en/US/products/products_security_advisory09186a0080a014a9.shtml
Vendor Advisory
securityfocus.com / bid/31366
Third Party AdvisoryVDB Entry
securitytracker.com / id
Broken LinkThird Party AdvisoryVDB Entry
vupen.com / english/advisories/2008/2670
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