Adobe Acrobat for Edge: Out-of-bounds write leads to code execution
Summary
Adobe Acrobat for Edge, the PDF extension integrated into Microsoft Edge, contains an out-of-bounds write vulnerability (CWE-787). An attacker who convinces a user to open a malicious PDF file could execute arbitrary code in the context of the current user. Exploitation requires user interaction, and no public exploitation is confirmed.
Affected
- Adobe Acrobat for Edge up to and including 154.0.4258.37 (per CVE record and VulDB)
- Version scheme and fixed build not confirmed by the vendor; check the installed extension version
Fixed in
- Reported fixed build: 154.0.4258.48 (per VulDB and a threat-intel mirror; not confirmed by the vendor)
Workaround
- No vendor-stated workaround found.
- Temporarily disable the Adobe Acrobat for Edge extension until the update is applied.
Exploitation
- No known exploitation in the wild; not listed in KEV.
- CISA SSVC: exploitation none, automatable no, technical impact total.
- Public PoC not confirmed.
Our recommendation
- Check whether the Adobe Acrobat for Edge extension is installed on endpoints and record its version.
- Install the vendor update from the Microsoft Update Guide once the fixed version is confirmed.
- Temporarily disable the extension on systems that cannot be patched promptly.
- Remind users not to open PDF files from unknown or untrusted sources.
- Monitor the Microsoft and Adobe advisories for confirmation.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-100134 msrc.microsoft.com
- VulDB: CVE-2026-100134 vuldb.com
- OpenCVE: CVE-2026-100134 app.opencve.io
- Strix: CVE-2026-100134 www.strix.ai
- Microsoft Edge stable channel release notes learn.microsoft.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 15:33.
Original description (NVD)
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.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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