Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-76459— Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities

Quick assessment

Affected
Cisco Cisco NX-OS Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

作为思科持续致力于主动安全和产品质量的一部分，思科 NX-OS 工程团队进行了一次全面的内部安全审查。此次审查催生了一款软件加固版本，旨在修复多个内部发现的漏洞。 CVE-2026-76459 所跟踪的漏洞与越界写入（out-of-bounds write）问题有关，这些问题归类于通用弱点枚举（CWE）中的 CWE-787。

CVSS 8.8 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-76459

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write Vulnerabilities
Source: CVE Program / CVE List V5
Vulnerability 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-2026-76459 are related to out-of-bounds write issues that are grouped under the Common Weakness Enumeration (CWE) CWE-787.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco NX-OS Software 8.2(5) -
Cisco Cisco NX-OS System Software in ACI Mode 15.2(1g) -
Cisco Cisco Unified Computing System (Managed) 4.0(1a) -

II. Public POCs for CVE-2026-76459

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-76459

请登录查看更多情报信息。

Other References for CVE-2026-76459 (1)

Same Patch Batch · Cisco · 2026-10-07 · 36 CVEs total

CVE-2026-76482 10.0 CRITICAL Cisco License On-Prem Security Hardening Release
CVE-2026-76465 9.8 CRITICAL Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability
CVE-2026-76455 9.8 CRITICAL Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Access Control Vu
CVE-2026-76471 9.8 CRITICAL Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
CVE-2026-76480 9.8 CRITICAL Cisco License On-Prem Security Hardening Release
CVE-2026-76500 9.8 CRITICAL Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Impro
CVE-2026-76501 9.8 CRITICAL Cisco Nexus 9000 Series Switches SRv6 OAM (NGOAM) Remote Code Execution Vulnerability
CVE-2026-76498 9.8 CRITICAL Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Impro
CVE-2026-76499 9.8 CRITICAL Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Impro
CVE-2026-76486 9.8 CRITICAL Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) Remote Code Execution Vulnerab
CVE-2026-76485 9.8 CRITICAL Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) Remote Code Execution Vulnerab
CVE-2026-76464 9.6 CRITICAL Cisco Meraki Hardening Release October 2026 - Buffer Management Vulnerabilities
CVE-2026-76454 9.1 CRITICAL Cisco Smart Software Manager On-Prem Unauthenticated API Vulnerability
CVE-2026-76483 9.1 CRITICAL Cisco License On-Prem Security Hardening Release
CVE-2026-20328 9.1 CRITICAL Cisco Smart Software Manager On-Prem Arbitrary Account Password Reset Vulnerability
CVE-2026-76484 8.8 HIGH Cisco License On-Prem Security Hardening Release
CVE-2026-76453 8.8 HIGH Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Neutralization Vu
CVE-2026-76463 8.8 HIGH Cisco Meraki Security Hardening Release: October 2026 - Improper Access Control Vulnerabil
CVE-2026-76470 8.8 HIGH Cisco Meraki Hardening Release - Incorrect Calculation Vulnerabilities
CVE-2026-76472 8.8 HIGH Cisco Meraki Security Hardening Release October 2026 - Improper Neutralization of Special

Showing top 20 of 36 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-787

V. Comments for CVE-2026-76459

No comments yet

Leave a comment