CVE-2024-20291: cisco cisco nx-os software Improper Access Control
Vulnerability summary
CVE-2024-20291 is a medium (CVSS 5.8) Improper Access Control vulnerability in cisco cisco nx-os software. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.6% of scored vulnerabilities.
Timeline
- 28-02-2024PublishedVulnerability first disclosed.
- 09-08-2024Last modifiedVulnerability information updated.
Description
A vulnerability in the access control list (ACL) programming for port channel subinterfaces of Cisco Nexus 3000 and 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, remote attacker to send traffic that should be blocked through an affected device. This vulnerability is due to incorrect hardware programming that occurs when configuration changes are made to port channel member ports. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to access network resources that should be protected by an ACL that was applied on port channel subinterfaces.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST5.8MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS trend
Probability
0.89%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
0.00 pp
From 0.89% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-284Improper Access ControlThe product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Affected systems
Cisco2 products
- cisco nx-os software9.3(10) | 9.3(11) | 9.3(12)
- nx-os9.3\(10\) | 9.3\(11\) | 9.3\(12\)
1 vendor · 2 products