CVE-2026-76457 Cisco NX-OS - Out-of-Bounds Read

Cisco NX-OS contains out-of-bounds read vulnerabilities (CWE-125) caused by improper bounds checking, letting attackers potentially read unauthorized memory, exploit requires network access.

CVSS base score 8.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-125

Vendor fix

Update to the latest Cisco NX-OS version with security hardening fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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