CVE-2020-26539 Use after free in n/a

Critical 9.8 Published 2 Oct 2020 Updated 4 Aug 2024

A use-after-free vulnerability in Foxit Reader allows remote attackers to execute arbitrary code or leak information via crafted PDF files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-26539?

CVE-2020-26539 is a critical use after free vulnerability in Foxitsoftware Foxit Reader, published on 2 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Foxit Reader and PhantomPDF before 10.1. When there is a multiple interpretation error for /V (in the Additional Action and Field dictionaries), a use-after-free can occur with resultant remote code execution (or an information leak).

Weakness: CWE-416

Which versions are affected by CVE-2020-26539?

It affects 2 products.

Products include Foxitsoftware Foxit Reader, Foxitsoftware Phantompdf.

How do I fix CVE-2020-26539?

No fix has been published for CVE-2020-26539 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2020-26539 being exploited?

There is no known exploitation of CVE-2020-26539 in the wild and no public exploit code.

All Foxitsoftware Foxit Reader vulnerabilities

Sources

Also known as GHSA-x9q9-5gcc-4mvx.