CVE-2026-76458 Denial of service in Cisco NX-OS Software
Attackers can cause denial of service in Cisco NX-OS devices by triggering improper handling of exceptional conditions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76458?
CVE-2026-76458 is a high-severity denial of service vulnerability in Cisco NX-OS Software, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76458 are related to improper handling of exceptional conditions issues that are grouped under the Common Weakness Enumeration (CWE) CWE-703.
Weakness: CWE-703
Which versions are affected by CVE-2026-76458?
How do I fix CVE-2026-76458?
No fix has been published for CVE-2026-76458 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-76458 being exploited?
There is no known exploitation of CVE-2026-76458 in the wild and no public exploit code.
Sources
Also known as GHSA-7q7g-394q-wv2p.