5.8
Medium
CVE-2021-1591 A vulnerability in the EtherChannel port subscription logic of Cisco Nexus 9500 Series Switches could allow an…
Description
A vulnerability in the EtherChannel port subscription logic of Cisco Nexus 9500 Series Switches could allow an unauthenticated, remote attacker to bypass access control list (ACL) rules that are configured on an affected device. This vulnerability is due to oversubscription of resources that occurs when applying ACLs to port channel interfaces. An attacker could exploit this vulnerability by attempting to access network resources that are protected by the ACL. A successful exploit could allow the attacker to access network resources that would be protected by the ACL that was applied on the port channel interface.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco NX-OS Software | Versions not published |
Other CVEs of Cisco NX-OS Software
The 102 CVEs of Cisco NX-OS Software →
CVE-2026-76501
A vulnerability in the Segment Routing over IPv6 (SRv6) Operation, Administration, and Maintenance (OAM) feature of…
9.8
Critical
CVE-2026-76486
A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known…
9.8
Critical
CVE-2026-76485
A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known…
9.8
Critical
CVE-2026-76458
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has…
8.6
High