---
id: "CVE-2026-20578"
kind: "vulnerability"
aliases: ["CVE-2026-20578"]
title: "Modem: side-channel flaw leaks data and enables remote denial of service"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["cellular", "infrastructure", "mobile-devices", "modem"]
not_affected_if: ["unknown"]
published_at: "2026-11-02T03:17:35+00:00"
first_seen_at: "2026-11-02T03:31:25+00:00"
updated_at: "2026-11-02T03:32:16+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20578", "first_seen_at": "2026-11-02T03:31:25+00:00"}]
---

# Modem: side-channel flaw leaks data and enables remote denial of service

A side-channel weakness in the modem firmware can disclose information. The description says a phone or device that connects to a rogue base station controlled by an attacker could suffer a remote denial of service, with no extra privileges and no user interaction needed.

_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-2026-20578

## From the sources

In Modem, there is a possible information disclosure due to side channel information disclosure. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01879164; Issue ID: MSV-9846.

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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_