What’s Vulnerable › Vulnerabilities

CVE-2001-0929

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2001-11-28 · updated 2026-06-16

Description

Cisco IOS Firewall Feature set, aka Context Based Access Control (CBAC) or Cisco Secure Integrated Software, for IOS 11.2P through 12.2T does not properly check the IP protocol type, which could allow remote attackers to bypass access control lists.

Affected products

• Cisco IOS: 11.2p, 11.3t, 12.0, 12.0t, 12.1, 12.1e (+3)

References

• http://www.cisco.com/warp/public/707/IOS-cbac-dynacl-pub.shtml
• http://www.kb.cert.org/vuls/id/362483
• http://www.osvdb.org/808
• http://www.securityfocus.com/bid/3588
• https://exchange.xforce.ibmcloud.com/vulnerabilities/7614
• http://www.cisco.com/warp/public/707/IOS-cbac-dynacl-pub.shtml
• http://www.kb.cert.org/vuls/id/362483
• http://www.osvdb.org/808
• http://www.securityfocus.com/bid/3588
• https://exchange.xforce.ibmcloud.com/vulnerabilities/7614

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