---
id: "CVE-2026-100134"
kind: "vulnerability"
aliases: ["CVE-2026-100134"]
title: "Acrobat for Edge: out-of-bounds write lets a malicious file run code"
severity: "high"
cvss: 8.8
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Acrobat for Edge", "fixed": ["154.0.4258.48"], "affected": "<= 154.0.4258.37", "ecosystem": "vendor"}]
ecosystems: []
tags: ["acrobat-for-edge", "microsoft-edge", "other", "pdf", "windows"]
not_affected_if: ["edge-154.0.4258.48-or-later", "no-acrobat-for-edge-installed"]
published_at: "2026-10-20T19:17:11+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-24T00:12:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-100134", "first_seen_at": "2026-10-23T21:57:21+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-24T00:12:39+00:00"}]
---

# Acrobat for Edge: out-of-bounds write lets a malicious file run code

Acrobat for Edge (the Adobe PDF viewer built into Microsoft Edge) has an out-of-bounds write (CWE-787) that runs code as the current user when a victim opens a malicious file. Edge builds up to 154.0.4258.37 are affected; 154.0.4258.48 is fixed. No known exploitation.

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

## Affected

- vendor:Acrobat for Edge affected <= 154.0.4258.37 fixed 154.0.4258.48

## How to check

Open edge://version and read the Edge version. If it is 154.0.4258.37 or lower, you are exposed. Check for Acrobat for Edge on Windows.

## Fix

Update Microsoft Edge to 154.0.4258.48 or later (edge://settings/help), then restart the browser.

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-100134
- 2026-10-24T00:12:39+00:00 analyst — CVE.org record (Adobe CNA) gives affected through 154.0.4258.37, fixed 154.0.4258.48; MSRC page is JS-only so not read directly. No exploitation or PoC found (VulDB: no exploit; KEV false). No X search done.

## Documents

- [advisory] CVE Record: CVE-2026-100134 (CNA record, affected through 154.0.4258.37, fixed 154.0.4258.48) https://www.cve.org/CVERecord?id=CVE-2026-100134
- [fix] MSRC Security Update Guide: CVE-2026-100134 (JS-only page) https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100134

## From the sources

Acrobat for Edge is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

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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_