What’s Vulnerable › Vulnerabilities

CVE-2012-4651

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2014-04-23 · updated 2026-06-16
• Weakness: CWE-189

Description

Cisco IOS before 15.3(2)T, when scansafe is enabled, allows remote attackers to cause a denial of service (latency) via SYN packets that are not accompanied by SYN-ACK packets from the Scan Safe Tower, aka Bug ID CSCub85451.

Affected products

• Cisco IOS: through 15.3\(3\)m2; 15.3, 15.3(2)s, 15.3(3)m, 15.3(3)m1, 15.3(3)s, 15.3s

References

• http://www.cisco.com/c/en/us/td/docs/ios/15_3m_and_t/release/notes/15_3m_and_t.pdf
• http://www.cisco.com/c/en/us/td/docs/ios/15_3m_and_t/release/notes/15_3m_and_t.pdf

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