Mmastodon TechnologyCybersecurity first seen 2 h ago, last 2 h ago, peak #10

Cisco patches critical 9.8 flaw in NX-OS software

Original: 🔴 CVE-2026-76455 - Critical (9.8) As part of Cisco's ongoing commitment to proactive security and product quality, the C

Cisco has issued a security hardening release for its NX-OS networking software following an internal engineering review, addressing a newly disclosed vulnerability tracked as CVE-2026-76455. The flaw carries a critical severity score of 9.8 out of 10, making it one of the most serious ratings possible, and security teams are urged to update affected devices promptly.

Why now: A maximum-severity vulnerability in widely used Cisco data center switches prompts urgent patching and discussion among network administrators.

CiscoCVE-2026-76455NX-OS

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Evidence

• 🔴 CVE-2026-76455 - Critical (9.8) 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… · thehackerwire

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