Skip to content
CVE PROGRAM SOURCE RECORD8.6 High

CVE-2026-76457

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
cisco

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cisco Cisco NX-OS Software

Default version status: unknown

  • 8.2(5)affected
  • 7.3(5)D1(1)affected
  • 8.4(2)affected
  • 8.4(3)affected
  • 9.2(3)affected
  • 8.2(1)affected
  • 7.3(1)D1(1)affected
  • 9.2(2v)affected
  • 7.3(0)D1(1)affected
  • 7.3(4)D1(1)affected
  • 9.2(1)affected
  • 9.2(2t)affected
  • 9.2(3y)affected
  • 9.3(2)affected
  • 7.3(1)DY(1)affected
  • 8.1(1)affected
  • 8.2(2)affected
  • 8.3(2)affected
  • 7.3(2)D1(3a)affected
  • 9.2(4)affected
  • 8.1(2)affected
  • 7.3(3)D1(1)affected
  • 8.2(3)affected
  • 8.3(1)affected
  • 8.4(1)affected
  • 8.1(1b)affected
  • 7.3(0)DX(1)affected
  • 7.3(2)D1(1)affected
  • 9.3(1)affected
  • 7.3(2)D1(2)affected
  • 8.2(4)affected
  • 7.3(0)DY(1)affected
  • 9.3(1z)affected
  • 9.2(2)affected
  • 8.1(2a)affected
  • 7.3(2)D1(3)affected
  • 8.1(1a)affected
  • 8.4(1a)affected
  • 9.3(3)affected
  • 7.3(2)D1(1d)affected
  • 9.3(4)affected
  • 7.3(6)D1(1)affected
  • 8.2(6)affected
  • 9.3(5)affected
  • 8.4(2a)affected
  • 8.4(2b)affected
  • 8.5(1)affected
  • 9.3(6)affected
  • 8.4(4)affected
  • 7.3(7)D1(1)affected
  • 8.4(2c)affected
  • 9.3(5w)affected
  • 8.2(7)affected
  • 9.3(7)affected
  • 9.3(7k)affected
  • 7.3(8)D1(1)affected
  • 9.3(7a)affected
  • 8.2(7a)affected
  • 9.3(8)affected
  • 8.4(4a)affected
  • 8.4(2d)affected
  • 8.4(5)affected
  • 8.2(8)affected
  • 9.3(9)affected
  • 7.3(9)D1(1)affected
  • 8.4(6)affected
  • 8.4(2e)affected
  • 9.3(10)affected
  • 9.2(1a)affected
  • 8.2(9)affected
  • 10.3(1)affected
  • 8.4(7)affected
  • 10.3(2)affected
  • 8.4(6a)affected
  • 9.3(11)affected
  • 10.3(3)affected
  • 9.4(1)affected
  • 9.3(2a)affected
  • 8.4(2f)affected
  • 8.2(10)affected
  • 9.3(12)affected
  • 10.4(1)affected
  • 8.4(8)affected
  • 10.3(99w)affected
  • 10.3(3w)affected
  • 10.3(99x)affected
  • 10.3(3o)affected
  • 8.4(9)affected
  • 10.3(4)affected
  • 10.3(3p)affected
  • 10.3(4a)affected
  • 9.4(1a)affected
  • 10.4(2)affected
  • 10.3(3q)affected
  • 9.3(13)affected
  • 8.2(11)affected
  • 9.4(2)affected
  • 10.3(5)affected
  • 10.4(3)affected
  • 10.3(3x)affected
  • 10.3(4g)affected
  • 10.5(1)affected
  • 8.4(10)affected
  • 9.4(2a)affected
  • 10.3(3r)affected
  • 10.3(6)affected
  • 9.3(14)affected
  • 10.4(4)affected
  • 10.3(4h)affected
  • 10.5(2)affected
  • 10.5(1j)affected
  • 8.4(11)affected
  • 9.4(3)affected
  • 10.3(7)affected
  • 10.4(5)affected
  • 10.5(3)affected
  • 9.3(15)affected
  • 9.4(3a)affected
  • 10.4(4g)affected
  • 10.5(4)affected
  • 9.4(3b)affected
  • 8.4(12)affected
  • 10.6(1)affected
  • 10.5(3t)affected
  • 10.3(8)affected
  • 10.4(6)affected
  • 10.5(3s)affected
  • 10.5(3e)affected
  • 9.4(4)affected
  • 10.5(3o)affected
  • 9.3(16)affected
  • 10.6(1s)affected
  • 10.6(2)affected
  • 10.5(3p)affected
  • 9.4(5)affected
  • 10.3(9)affected
  • 10.6(2s)affected
  • 8.4(13)affected
  • 10.6(3)affected
  • 10.4(7)affected
  • 10.5(5)affected
  • 9.3(17)affected
  • 10.6(2n)affected
  • 10.6(3q)affected
  • 10.6(3o)affected
  • 10.6(3s)affected

Cisco Cisco NX-OS System Software in ACI Mode

Default version status: unknown

  • 15.2(1g)affected
  • 15.2(2e)affected
  • 15.2(2f)affected
  • 15.2(2g)affected
  • 15.2(2h)affected
  • 15.2(3f)affected
  • 15.2(3e)affected
  • 15.2(3g)affected
  • 15.2(4d)affected
  • 15.2(4e)affected
  • 15.2(5c)affected
  • 15.2(5d)affected
  • 16.0(1g)affected
  • 15.2(5e)affected
  • 15.2(4f)affected
  • 15.2(6e)affected
  • 15.2(6h)affected
  • 16.0(1j)affected
  • 15.2(6g)affected
  • 15.2(7f)affected
  • 15.2(7g)affected
  • 16.0(2h)affected
  • 15.2(8d)affected
  • 16.0(2j)affected
  • 15.2(8e)affected
  • 16.0(3d)affected
  • 16.0(3e)affected
  • 15.2(8f)affected
  • 15.2(8g)affected
  • 15.3(1d)affected
  • 15.2(8h)affected
  • 16.0(4c)affected
  • 15.3(2a)affected
  • 15.2(8i)affected
  • 16.0(5h)affected
  • 15.3(2b)affected
  • 16.0(3g)affected
  • 16.0(5j)affected
  • 15.3(2c)affected
  • 16.0(6c)affected
  • 15.3(2d)affected
  • 16.1(1f)affected
  • 16.0(7e)affected
  • 16.0(8e)affected
  • 15.3(2e)affected
  • 16.0(8f)affected
  • 16.1(2f)affected
  • 16.1(2g)affected
  • 15.3(2f)affected
  • 16.0(9c)affected
  • 16.1(3f)affected
  • 16.0(9d)affected
  • 16.0(6h)affected
  • 16.0(8h)affected
  • 16.1(3g)affected
  • 16.0(9e)affected
  • 16.1(4h)affected
  • 16.1(5e)affected
  • 16.2(1g)affected
  • 16.0(9f)affected
  • 16.2(2e)affected

Cisco Cisco Unified Computing System (Managed)

Default version status: unknown

  • 4.0(1a)affected
  • 4.1(1d)affected
  • 4.0(4f)affected
  • 4.0(4c)affected
  • 4.0(2b)affected
  • 4.1(2a)affected
  • 4.0(4a)affected
  • 4.0(4e)affected
  • 4.0(4h)affected
  • 4.0(2a)affected
  • 4.1(1c)affected
  • 4.0(1b)affected
  • 4.1(1e)affected
  • 4.0(4d)affected
  • 4.0(4b)affected
  • 4.0(2e)affected
  • 4.1(1a)affected
  • 4.0(4g)affected
  • 4.0(1d)affected
  • 4.0(1c)affected
  • 4.0(4i)affected
  • 4.0(2d)affected
  • 4.1(1b)affected
  • 4.1(2b)affected
  • 4.0(4k)affected
  • 4.1(3a)affected
  • 4.1(3b)affected
  • 4.1(2c)affected
  • 4.0(4l)affected
  • 4.1(4a)affected
  • 4.1(3c)affected
  • 4.1(3d)affected
  • 4.2(1c)affected
  • 4.2(1d)affected
  • 4.0(4m)affected
  • 4.1(3e)affected
  • 4.2(1f)affected
  • 4.1(3f)affected
  • 4.2(1i)affected
  • 4.1(3h)affected
  • 4.2(1k)affected
  • 4.2(1l)affected
  • 4.0(4n)affected
  • 4.2(1m)affected
  • 4.1(3i)affected
  • 4.2(2a)affected
  • 4.2(1n)affected
  • 4.1(3j)affected
  • 4.2(2c)affected
  • 4.2(2d)affected
  • 4.2(3b)affected
  • 4.1(3k)affected
  • 4.0(4o)affected
  • 4.2(2e)affected
  • 4.2(3d)affected
  • 4.2(3e)affected
  • 4.2(3g)affected
  • 4.1(3l)affected
  • 4.3(2b)affected
  • 4.2(3h)affected
  • 4.2(3i)affected
  • 4.3(2c)affected
  • 4.1(3m)affected
  • 4.3(2e)affected
  • 4.3(3a)affected
  • 4.2(3j)affected
  • 4.3(3c)affected
  • 4.3(4a)affected
  • 4.2(3k)affected
  • 4.3(4b)affected
  • 4.3(4c)affected
  • 4.2(3l)affected
  • 4.3(4d)affected
  • 4.3(2f)affected
  • 4.2(3m)affected
  • 4.3(5a)affected
  • 4.3(4e)affected
  • 4.1(3n)affected
  • 4.3(4f)affected
  • 4.2(3n)affected
  • 4.3(5c)affected
  • 4.2(3o)affected
  • 4.3(5d)affected
  • 4.3(6a)affected
  • 4.3(6b)affected
  • 4.3(5e)affected
  • 4.3(6c)affected
  • 4.2(3p)affected
  • 6.0(1b)affected
  • 6.0(1c)affected
  • 4.3(6d)affected
  • 6.0(1d)affected
  • 6.0(1e)affected
  • 4.3(6e)affected
  • 6.0(1f)affected
  • 4.3(6f)affected
  • 6.0(2b)affected
  • 6.0(1h)affected
  • 4.2(3r)affected
  • 6.0(2c)affected
  • 4.3(6g)affected
  • 6.0(2d)affected
  • 4.3(6h)affected
  • 4.2(3s)affected
  • 4.3(6i)affected

References