---
id: "CVE-2026-76493"
kind: "vulnerability"
aliases: ["CVE-2026-76493"]
title: "Cisco Expressway: uncaught exceptions in hardening releases allow service disruption"
severity: "high"
cvss: 7.5
epss: 0.00263
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cisco", "expressway", "infrastructure", "self-hosted", "video-collaboration"]
not_affected_if: []
published_at: "2026-10-21T17:19:08+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T03:16:30+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76493", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76493", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Cisco Expressway: uncaught exceptions in hardening releases allow service disruption

Cisco Expressway Series software contains uncaught exception flaws (CWE-248) found in an internal security review. The sources do not state what an attacker can do beyond the crash-type weakness class.

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

## How to check

- Check the installed Cisco Expressway software version against the fixed releases in Cisco's advisory.
- unknown for further checks; the sources do not name the affected versions.

## Fix

- Upgrade Cisco Expressway to a fixed hardening release listed in the Cisco advisory.
- Exact fixed version: unknown.

## Timeline

- 2026-10-23T21:57:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-76493
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-76493

## From the sources

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Expressway Series software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.  

The vulnerabilities tracked by CVE-2026-76493 are related to issues concerning uncaught exceptions that are grouped under the Common Weakness Enumeration (CWE) Base CWE-248.

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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_