---
id: "CVE-2026-20577"
kind: "vulnerability"
aliases: ["CVE-2026-20577"]
title: "Modem firmware: permission bypass lets a privileged process cause local denial of service"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "mobile-devices", "modem"]
not_affected_if: ["no-system-privilege-access"]
published_at: "2026-11-02T03:17:35+00:00"
first_seen_at: "2026-11-02T03:31:25+00:00"
updated_at: "2026-11-02T03:32:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20577", "first_seen_at": "2026-11-02T03:31:25+00:00"}]
---

# Modem firmware: permission bypass lets a privileged process cause local denial of service

A permission bypass in the Modem component can cause a local denial of service. An attacker must already hold the System privilege on the device to trigger it.

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

## Timeline

- 2026-11-02T03:31:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-20577

## From the sources

In Modem, there is a possible permission bypass due to a permissions bypass. This could lead to local denial of service if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: MOLY01880753; Issue ID: MSV-9866.

---

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