CVE-2026-76457— Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Read 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 工程团队开展了一项全面的内部安全审查。此次审查产生了一个软件加固版本，旨在解决多个内部发现的安全漏洞。 与 CVE-2026-76457 相关的漏洞属于越界读取问题，归类于通用弱点枚举（CWE）中的 CWE-125。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-76457
Vulnerability Information
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Vulnerability Title
Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Read 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-2026-76457 are related to out-of-bounds read issues that are grouped under the Common Weakness Enumeration (CWE) CWE-125.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
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-2026-76457
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-76457 (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-2026-76459 | 8.8 HIGH | Cisco NX-OS Software Security Hardening Release: October 2026 - Out-of-bounds Write Vulner |
| CVE-2026-76470 | 8.8 HIGH | Cisco Meraki Hardening Release - Incorrect Calculation Vulnerabilities |
Showing top 20 of 36 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Cisco NX-OS Software
-
CVE-2026-76501
Cisco Nexus 9000 Series Switches SRv6 OAM (NGOAM) Remote Cod -
CVE-2026-76486
Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) -
CVE-2026-76485
Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) -
CVE-2026-76458
Cisco NX-OS Software Security Hardening Release: October 202 -
CVE-2026-76459
Cisco NX-OS Software Security Hardening Release: October 202
Same vendor: Cisco
-
CVE-2026-76472
Cisco Meraki Security Hardening Release October 2026 - Impro -
CVE-2026-76467
Cisco Meraki Software Hardening Release - Resource Lifetime -
CVE-2026-76470
Cisco Meraki Hardening Release - Incorrect Calculation Vulne -
CVE-2026-76469
Cisco Meraki Security Hardening Release: October 2026 Insuff -
CVE-2026-76468
Cisco Meraki Hardening Release - Input Validation Vulnerabil
Same weakness: CWE-125
-
CVE-2026-77214
libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBu -
CVE-2026-106061
Gimp: gimp: heap buffer over-read in x cursor (xmc) thumbnai -
CVE-2026-65122
NVIDIA TensorRT越界读取漏洞致拒绝服务 -
CVE-2026-19029
HDF5 scale-offset filter heap buffer over-read via crafted c -
CVE-2026-102164
Security Advisory 0196
V. Comments for CVE-2026-76457
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