CVE-2026-76455

CRITICAL

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 s...

Affects 0 products across 1 vendor.

CVSS 3.19.8
EPSS0.3%
Percentile19th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-284: Improper Access Control

Software does not restrict or incorrectly restricts access to a resource.

Related Attack Patterns (CAPEC)
CAPEC-478 Modification of Windows Service Configuration
via CWE-284
CAPEC-479 Malicious Root Certificate
via CWE-284
CAPEC-546 Incomplete Data Deletion in a Multi-Tenant Environment
via CWE-284
CAPEC-550 Install New Service
via CWE-284
CAPEC-551 Modify Existing Service
via CWE-284
Show all 17

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-76455) affects the target system. 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 int...

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Frequently Asked Questions
What is CVE-2026-76455?
A critical severity vulnerability (CVE-2026-76455) affects the target system. 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 int...
What is the CVSS score for CVE-2026-76455?
CVE-2026-76455 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.3%.
Is CVE-2026-76455 actively exploited?
No confirmed active exploitation of CVE-2026-76455 as of 2026-10-11.
How do I remediate CVE-2026-76455?
Apply vendor patches for CVE-2026-76455. Monitor Cisco advisories.
What systems are affected by CVE-2026-76455?
CVE-2026-76455 affects: Cisco.
Vulnerability Details
CVE IDCVE-2026-76455
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-10-07
Last Modified2026-10-08
ICS Relevance70%
Weakness (CWE)
Improper Access Control
SourceNVD
Official 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-2026-76455 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-284.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Cisco — —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 3 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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