---
id: "CVE-2026-20565"
kind: "vulnerability"
aliases: ["CVE-2026-20565"]
title: "Modem firmware: out-of-bounds write lets local code escalate privileges"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "mobile-devices", "modem"]
not_affected_if: []
published_at: "2026-11-02T03:17:33+00:00"
first_seen_at: "2026-11-02T03:31:25+00:00"
updated_at: "2026-11-02T03:32:28+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20565", "first_seen_at": "2026-11-02T03:31:25+00:00"}]
---

# Modem firmware: out-of-bounds write lets local code escalate privileges

A bounds check in the modem software is incorrect, allowing an out-of-bounds write. An attacker with local code execution could escalate privileges without user interaction.

_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-2026-20565

## From the sources

In Modem, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01778991; Issue ID: MSV-8900.

---

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