---
id: "CVE-2026-76435"
kind: "vulnerability"
aliases: ["CVE-2026-76435"]
title: "Cisco Expressway: unauthenticated MRA request leaks sensitive device information"
severity: "medium"
cvss: 5.3
epss: 0.00341
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cisco", "expressway", "infrastructure", "mobile-and-remote-access", "on-prem-appliance"]
not_affected_if: ["no-expressway-deployed"]
published_at: "2026-10-21T17:19:06+00:00"
first_seen_at: "2026-10-23T21:57:29+00:00"
updated_at: "2026-10-25T04:20:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76435", "first_seen_at": "2026-10-23T21:57:29+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-76435", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Cisco Expressway: unauthenticated MRA request leaks sensitive device information

Cisco Expressway Core and Edge devices do not check authorization on certain HTTP requests made during Mobile and Remote Access provisioning. A remote attacker can send a crafted URL request without logging in and read sensitive information the device would normally protect.

_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-2026-76435
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-76435

## From the sources

A vulnerability in Cisco Expressway Series could allow an unauthenticated, remote attacker to obtain sensitive information from an affected device.

This vulnerability is due to insufficient authorization checks of HTTP requests during Mobile and Remote Access (MRA) provisioning. An attacker could exploit this vulnerability by submitting a crafted URL request to an affected device. A successful exploit could allow the attacker to access sensitive information that they would otherwise not have authorization to access.
Note: Cisco Expressway Series refers to Cisco Expressway Core (Expressway-C) devices and Cisco Expressway Edge (Expressway-E) devices.

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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_