CVE-2026-76458: Improper Check or Handling of Exceptional Conditions in Cisco Cisco NX-OS Software
Description
CVE-2026-76458 is a high-severity vulnerability in Cisco NX-OS Software involving improper handling of exceptional conditions. This issue is related to CWE-703, which concerns software robustness failures. The vulnerability can lead to a denial of service impact but does not affect confidentiality or integrity. Cisco has conducted an internal security review and released a software hardening update addressing multiple such vulnerabilities.
CVSS v3.1
Score 8.6high
Affected software
Cisco
Cisco NX-OS Software
Cisco
Cisco NX-OS System Software in ACI Mode
Cisco
Cisco Unified Computing System (Managed)
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Cisco NX-OS Software contains vulnerabilities due to improper check or handling of exceptional conditions (CWE-703). These flaws were identified during an internal security review and grouped under CVE-2026-76458. The vulnerability has a CVSS 3.1 base score of 8.6, indicating high severity, with network attack vector, low attack complexity, no privileges required, no user interaction, and scope changed. The impact is limited to availability (denial of service) without affecting confidentiality or integrity.
Potential Impact
The vulnerability can cause denial of service conditions in affected Cisco NX-OS Software systems, potentially disrupting network operations. There is no reported impact on confidentiality or integrity. No known exploits are currently in the wild.
Mitigation Recommendations
Cisco has released a software hardening update as part of their internal security review to address this and other related vulnerabilities. Users should apply the official Cisco NX-OS software updates once available. Patch status is not explicitly confirmed in the provided data; therefore, check Cisco's official advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2026-08-19T12:02:03.637Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac674882cdf04f65664732c
Added to database: 10/07/2026, 16:34:16 UTC
Last enriched: 10/07/2026, 16:51:24 UTC
Last updated: 10/07/2026, 18:56:10 UTC
Views: 9
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