CVE-2001-0929
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 2.09% probability · 81th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- cisco/ios
- Source
- cve@mitre.org
EPSS 2.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.cisco.com/warp/public/707/IOS-cbac-dynacl-pub.shtmlPatch, Vendor Advisory
- http://www.kb.cert.org/vuls/id/362483US Government Resource
- 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.shtmlPatch, Vendor Advisory
- http://www.kb.cert.org/vuls/id/362483US Government Resource
- http://www.osvdb.org/808
- http://www.securityfocus.com/bid/3588
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7614
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.