SB2026022614 - Denial of service in Cisco Nexus 9000 Series Fabric Switches in ACI Mode SNMP
Published: February 26, 2026
Security Bulletin ID
SB2026022614
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Uncontrolled memory allocation (CVE-ID: CVE-2026-20048)
The vulnerability allows a remote user to perform a denial of service attack.
The vulnerability exists due to a boundary error in the Simple Network Management Protocol (SNMP) subsystem. A remote user with read-only access can send specially crafted SNMP packets to the device and perform a denial of service attack. SNMP versions 1, 2c, and 3 are affected.
Remediation
Install update from vendor's website.