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CVE-2012-4651

17
FAUCET Score

CVE-2012-4651 describes a denial-of-service vulnerability in Cisco IOS versions prior to 15.3(2)T when the scansafe feature is enabled. An attacker can exploit this by sending SYN packets not followed by SYN-ACK packets from the Scan Safe Tower, leading to network latency. This vulnerability has a CVSS score of 4.3 (Medium), indicating a network-based attack with medium complexity and a partial availability impact. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 15.3\(3\)m2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
15.3CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3:*:*:*:*:*:*:*
15.3\(2\)sCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3\(2\)s:*:*:*:*:*:*:*
15.3\(3\)mCPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3\(3\)m:*:*:*:*:*:*:*
15.3\(3\)m1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.3\(3\)m1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.3MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.09%
Probability of exploitation in next 30 days
EPSS Percentile
62.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0109 is in the 24th percentile among its peer group of 19,955 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 / c/en/us/td/docs/ios/15_3m_and_t/release/notes/15_3m_and_t.pdf