CVE-2026-76501 is a vulnerability in Cisco Nx Os
Published on October 7, 2026
Cisco Nexus 9000 Series Switches SRv6 OAM (NGOAM) Remote Code Execution Vulnerability
A vulnerability in the Segment Routing over IPv6 (SRv6) Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) on an affected device.
This vulnerability is due to improper input validation of IP traffic when the NGOAM and SRv6 features are enabled. An attacker could exploit this vulnerability by sending crafted packets to an IP interface on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes resulting in a reload and DoS condition.
Vulnerability Analysis
CVE-2026-76501 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Stack Overflow Vulnerability?
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
CVE-2026-76501 has been classified to as a Stack Overflow vulnerability or weakness.
Products Associated with CVE-2026-76501
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Affected Versions
Cisco NX-OS Software:- Version 9.3(3) is affected.
- Version 9.3(4) is affected.
- Version 9.3(5) is affected.
- Version 9.3(6) is affected.
- Version 9.3(5w) is affected.
- Version 9.3(7) is affected.
- Version 9.3(7k) is affected.
- Version 9.3(7a) is affected.
- Version 9.3(8) is affected.
- Version 9.3(9) is affected.
- Version 9.3(10) is affected.
- Version 10.3(1) is affected.
- Version 10.3(2) is affected.
- Version 9.3(11) is affected.
- Version 10.3(3) is affected.
- Version 9.3(12) is affected.
- Version 10.4(1) is affected.
- Version 10.3(99w) is affected.
- Version 10.3(3w) is affected.
- Version 10.3(99x) is affected.
- Version 10.3(3o) is affected.
- Version 10.3(4) is affected.
- Version 10.3(3p) is affected.
- Version 10.3(4a) is affected.
- Version 10.4(2) is affected.
- Version 10.3(3q) is affected.
- Version 9.3(13) is affected.
- Version 10.3(5) is affected.
- Version 10.4(3) is affected.
- Version 10.3(3x) is affected.
- Version 10.3(4g) is affected.
- Version 10.5(1) is affected.
- Version 10.3(3r) is affected.
- Version 10.3(6) is affected.
- Version 9.3(14) is affected.
- Version 10.4(4) is affected.
- Version 10.3(4h) is affected.
- Version 10.5(2) is affected.
- Version 10.3(7) is affected.
- Version 10.4(5) is affected.
- Version 10.5(3) is affected.
- Version 9.3(15) is affected.
- Version 10.4(4g) is affected.
- Version 10.5(4) is affected.
- Version 10.6(1) is affected.
- Version 10.5(3t) is affected.
- Version 10.3(8) is affected.
- Version 10.4(6) is affected.
- Version 10.5(3s) is affected.
- Version 10.5(3e) is affected.
- Version 10.5(3o) is affected.
- Version 9.3(16) is affected.
- Version 10.6(1s) is affected.
- Version 10.6(2) is affected.
- Version 10.5(3p) is affected.
- Version 10.3(9) is affected.
- Version 10.6(2s) is affected.
- Version 10.6(3) is affected.
- Version 10.4(7) is affected.
- Version 10.5(5) is affected.
- Version 9.3(17) is affected.
- Version 10.6(2n) is affected.
- Version 10.6(3s) is affected.