VULNERABILITY INTELLIGENCE

CVE-2021-21798

CVSS score7.8 HIGH
EPSS probability21.37%
CISA KEVNot currently listed
Published2021-09-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

An exploitable return of stack variable address vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a stack variable to go out of scope, resulting in the application dereferencing a stale pointer. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger the vulnerability.

Weakness classification

  • talos-cna@cisco.com: CWE-562
  • nvd@nist.gov: NVD-CWE-Other

Primary references