All vulnerabilities
CVE-2026-76457

Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Read Vulnerabilities

Cisco Cisco NX-OS SoftwareNetwork & edge
Open in ThreatlineRecord JSON
CVSS
8.6High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.28%Chance of exploitation activity in the next 30 days, higher than 19% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published7 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

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 multiple internally discovered vulnerabilities.

The vulnerabilities tracked by CVE-2026-76457 are related to out-of-bounds read issues that are grouped under the Common Weakness Enumeration (CWE) CWE-125.

Text from CVE List

Affected versions 90

  • Cisco NX-OS Softwareaffected: 8.2(5)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(5)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.4(2)CVE List
  • Cisco NX-OS Softwareaffected: 8.4(3)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(3)CVE List
  • Cisco NX-OS Softwareaffected: 8.2(1)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(1)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(2v)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(0)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(4)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(1)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(2t)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(3y)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(2)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(1)DY(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.1(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.2(2)CVE List
  • Cisco NX-OS Softwareaffected: 8.3(2)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(2)D1(3a)CVE List
  • Cisco NX-OS Softwareaffected: 9.2(4)CVE List
  • Cisco NX-OS Softwareaffected: 8.1(2)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(3)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.2(3)CVE List
  • Cisco NX-OS Softwareaffected: 8.3(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.4(1)CVE List
  • Cisco NX-OS Softwareaffected: 8.1(1b)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(0)DX(1)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(2)D1(1)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(1)CVE List
  • Cisco NX-OS Softwareaffected: 7.3(2)D1(2)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(1g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(2e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(2f)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(2g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(2h)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(3f)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(3e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(3g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(4d)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(4e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(5c)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(5d)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(1g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(5e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(4f)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(6e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(6h)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(1j)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(6g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(7f)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(7g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(2h)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(8d)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(2j)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(8e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(3d)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 16.0(3e)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(8f)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.2(8g)CVE List
  • Cisco NX-OS System Software in ACI Modeaffected: 15.3(1d)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(1a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(1d)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4f)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4c)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(2b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(2a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4e)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4h)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(2a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(1c)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(1b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(1e)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4d)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(2e)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(1a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4g)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(1d)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(1c)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4i)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(2d)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(1b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(2b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4k)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(3a)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(3b)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(2c)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.0(4l)CVE List
  • Cisco Unified Computing System (Managed)affected: 4.1(4a)CVE List

References 1