CVE-2026-76501

Received
Published: 07 Oct 2026, 16:17
Last modified:07 Oct 2026, 16:43

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.8 CRITICAL
v3.1 (cve.org)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 Oct 2026, 16:17
Published
Vulnerability first disclosed
07 Oct 2026, 16:43
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Techniques & Countermeasures

  • CWE-121•Stack-based Buffer Overflow

    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).

Affected Systems

  • cisco•cisco nx-os software

    9.3(3) | 9.3(4) | 9.3(5) | 9.3(6) | 9.3(5w) | 9.3(7) | 9.3(7k) | 9.3(7a) | 9.3(8) | 9.3(9) | 9.3(10) | 10.3(1) | 10.3(2) | 9.3(11) | 10.3(3) | 9.3(12) | 10.4(1) | 10.3(99w) | 10.3(3w) | 10.3(99x) | 10.3(3o) | 10.3(4) | 10.3(3p) | 10.3(4a) | 10.4(2) | 10.3(3q) | 9.3(13) | 10.3(5) | 10.4(3) | 10.3(3x) | 10.3(4g) | 10.5(1) | 10.3(3r) | 10.3(6) | 9.3(14) | 10.4(4) | 10.3(4h) | 10.5(2) | 10.3(7) | 10.4(5) | 10.5(3) | 9.3(15) | 10.4(4g) | 10.5(4) | 10.6(1) | 10.5(3t) | 10.3(8) | 10.4(6) | 10.5(3s) | 10.5(3e) | 10.5(3o) | 9.3(16) | 10.6(1s) | 10.6(2) | 10.5(3p) | 10.3(9) | 10.6(2s) | 10.6(3) | 10.4(7) | 10.5(5) | 9.3(17) | 10.6(2n) | 10.6(3s)

References (1)