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CVE-2011-4007

18
FAUCET Score

CVE-2011-4007 describes a denial-of-service vulnerability in Cisco IOS 15.0, 15.1, and IOS XE 3.x, specifically impacting devices configured with the "set mpls experimental imposition" command. Remote attackers can trigger a device crash by sending network traffic that causes fragmentation or reassembly issues. With a CVSS score of 5.4 (AV:N/AC:H/Au:N/C:N/I:N/A:C), this vulnerability has a high attack complexity but can lead to a complete loss of availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, suggesting a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
15.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*
3.1.0sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.1.0s:*:*:*:*:*:*:*
3.1.0sgCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.1.0sg:*:*:*:*:*:*:*
3.1.1sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:3.1.1s:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.4MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
4.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.20%
Probability of exploitation in next 30 days
EPSS Percentile
65.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0120 is in the 31st percentile among its peer group of 19,956 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

cisco.com / en/US/docs/ios/ios_xe/3/release/notes/asr1k_caveats_33s.html
securitytracker.com / id