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Vulnerabilities & CVEs SecurityWeek 1 week ago

Cisco Patches a Dozen Critical Vulnerabilities

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CyberNew Threat Research Desk
• Original Reporting: SecurityWeek
CyberNew Threat Intel Assessment
Assessed Severity: CRITICAL
Impacted Surface
Enterprise Perimeter & Network Defense
Intelligence Sector
Vulnerabilities & CVEs

Analyst Takeaway

"Cisco on Wednesday announced patches for 35 vulnerabilities across its products, including over a dozen critical-severity bugs. A fresh Meraki security hardening release fixes multiple bugs grouped together under seven CVEs, based on the underlying weakness type. The most severe of these is CVE-2026-76464, which covers memory issues such as buffer overflows and out-of-bounds writes. Cisco also..."

Recommended Defense & Mitigation

  • Emergency Patching: Prioritize vendor patches and CVE mitigation across internet-facing assets immediately.
  • Perimeter Audit: Inspect perimeter firewall logs and hunt for unauthorized RCE indicators.
Curated & Verified by CyberNew Threat Intelligence Desk Standard Defense Framework (NIST / MITRE ATT&CK)
Cisco vulnerabilities

Cisco on Wednesday announced patches for 35 vulnerabilities across its products, including over a dozen critical-severity bugs.

A fresh Meraki security hardening release fixes multiple bugs grouped together under seven CVEs, based on the underlying weakness type. The most severe of these is CVE-2026-76464, which covers memory issues such as buffer overflows and out-of-bounds writes.

Cisco also resolved eight bugs in License On-Prem, including five critical-severity issues. Two of them could lead to unauthorized access (CVE-2026-20328) and DoS conditions (CVE-2026-76454), and could be exploited without authentication.

The remaining three CVEs, CVE-2026-76482, CVE-2026-76480, and CVE-2026-76483, cover multiple security holes across missing authentication, improper verification of cryptographic signature, and insufficiently protected credentials.

NX-OS received fixes for 14 vulnerabilities, including seven critical-severity issues. Multiple improper access control and out-of-bounds write flaws have been grouped together under two CVEs: CVE-2026-76455 and CVE-2026-76459.

Two other bugs, CVE-2026-76471 and CVE-2026-76465, could allow remote, unauthenticated attackers to execute arbitrary code with root privileges or cause a DoS condition.

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The remaining three issues, CVE-2026-76485, CVE-2026-76486, and CVE-2026-76501, can only be triggered on Nexus 3000 and Nexus 9000 series switches that have Next Generation OAM (NGOAM) enabled.

Written By Ionut Arghire

Source Verification & Original Intelligence

This threat report was reviewed by CyberNew analysts and cross-referenced with primary security disclosures from SecurityWeek.

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