CVE-2001-0864

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2001-12-06 · updated 2026-06-16

Description

Cisco 12000 with IOS 12.0 and line cards based on Engine 2 does not properly handle the implicit "deny ip any any" rule in an outgoing ACL when the ACL contains exactly 448 entries, which can allow some outgoing packets to bypass access restrictions.

Affected products

Cisco 12000 Router: all versions

References

http://www.ciac.org/ciac/bulletins/m-018.shtml
http://www.cisco.com/warp/public/707/GSR-ACL-pub.shtml
http://www.osvdb.org/1986
http://www.securityfocus.com/bid/3536
https://exchange.xforce.ibmcloud.com/vulnerabilities/7553
http://www.ciac.org/ciac/bulletins/m-018.shtml
http://www.cisco.com/warp/public/707/GSR-ACL-pub.shtml
http://www.osvdb.org/1986
http://www.securityfocus.com/bid/3536
https://exchange.xforce.ibmcloud.com/vulnerabilities/7553

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