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CVE-2011-3281

24
FAUCET Score

CVE-2011-3281 describes an unspecified vulnerability in Cisco IOS versions 15.0 through 15.1, specifically impacting configurations with HTTP Layer 7 Application Control and Inspection. A remote attacker can exploit this flaw by sending a specially crafted HTTP packet, leading to a denial of service through a device reload or hang. With a CVSS score of 7.8, this vulnerability is considered highly severe due to its network-based attack vector and complete availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
15.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0:*:*:*:*:*:*:*
15.0mCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0m:*:*:*:*:*:*:*
15.0sgCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0sg:*:*:*:*:*:*:*
15.0xaCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0xa:*:*:*:*:*:*:*
15.0xoCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0xo:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.80%
Probability of exploitation in next 30 days
EPSS Percentile
76.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0180 is in the 59th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

tools.cisco.com / security/center/viewAlert.x
cisco.com / en/US/products/products_security_advisory09186a0080b95d57.shtml
Vendor Advisory