CVE-2021-21796

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-10-18 · updated 2026-06-17
Weakness: CWE-416

Description

An exploitable use-after-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause an object containing the path to a document to be destroyed and then later reused, resulting in a use-after-free vulnerability, which can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger this vulnerability.

Affected products

Nitro Pro: 13.31.0.605, 13.33.2.645

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1265
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1265

Get alerted when CVE-2021-21796 or the next vulnerability affects your stack