Out-of-Bounds Read Vulnerabilities in Cisco NX-OS Products
CVE-2026-76457

8.6HIGH

Key Information:

Vendor

Cisco
Status
Cisco Nx-os Software
Cisco Nx-os System Software In Aci Mode
Cisco Unified Computing System (managed)
Vendor
CVE Published:
7 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-76457?

The vulnerabilities identified in Cisco NX-OS are associated with out-of-bounds read issues, which may enable attackers to access unauthorized memory locations. This situation arises when a program reads data past its allocated buffer, potentially leaking sensitive information. In response, Cisco has implemented a software hardening release aimed at mitigating these vulnerabilities and enhancing the overall security posture of its NX-OS products.

Affected Version(s)

Cisco NX-OS Software 8.2(5)

Cisco NX-OS Software 7.3(5)D1(1)

Cisco NX-OS Software 8.4(2)

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.