---
id: "CVE-2026-76528"
kind: "vulnerability"
aliases: ["CVE-2026-76528"]
title: "Cisco: hardening release fixes internal protection-mechanism flaws, details withheld"
severity: "unknown"
cvss: null
epss: 0.00134
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["cisco", "vendor"]
not_affected_if: []
published_at: "2026-10-21T23:17:29+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T05:00:38+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76528", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76528", "first_seen_at": "2026-10-24T07:15:52+00:00"}]
---

# Cisco: hardening release fixes internal protection-mechanism flaws, details withheld

Cisco reports a software hardening release that fixes several internally found flaws classed as CWE-693, protection mechanism failure. The sources give no product, versions or attacker capability, so the practical impact is unknown.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-76528
- 2026-10-24T07:15:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-76528

## From the sources

As part of Cisco's ongoing commitment to proactive security and product quality, Cisco 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-2026-76528 are related to protection mechanism failure and are grouped under the Common Weakness Enumeration (CWE) CWE-693.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_