SB2026022615 - Denial of service in Cisco Nexus 9000 Series Fabric Switches in ACI Mode
Published: February 26, 2026
Security Bulletin ID
SB2026022615
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer Access with Incorrect Length Value (CVE-ID: CVE-2026-20033)
The vulnerability allows a remote attacker to perform a denial of service attack.
The vulnerability exists due to improper input validation when processing specific Ethernet frames. A remote attacker on the local network can send specially crafted data to the out-of-band (OOB) management interface of an affected device and perform a denial of service attack.
Remediation
Install update from vendor's website.