CVE-2026-91812 Foxit PDF Editor/Reader FoxitUpdater Improper Certificate Validation Local Privilege Escalation Vulnerability
Attackers can bypass certificate validation in Foxit PDF software to execute arbitrary code with system privileges via man-in-the-middle attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-91812?
CVE-2026-91812 is a high-severity vulnerability in Foxit Pdf Editor, published on 23 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows man-in-the-middle attackers to bypass certificate validation and package integrity checks, potentially enabling arbitrary code execution with system privileges.
Weakness: CWE-295
Which versions are affected by CVE-2026-91812?
It affects 2 products.
Products include Foxit Pdf Editor, Foxit Pdf Reader.
How do I fix CVE-2026-91812?
No fix has been published for CVE-2026-91812 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91812 being exploited?
There is no known exploitation of CVE-2026-91812 in the wild and no public exploit code.
Other vulnerabilities in Foxit Pdf Editor
Sources
Also known as GHSA-748f-jhmv-j7jm.