CVE-2021-21798
HIGHEPSS 97th pctlDescription
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.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 97% of all known CVEs.
References
Related Vulnerabilities
Other CWE-562 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-41837 | Critical | 9.8 | 1.6% | - | Fix |
| CVE-2024-4418 | Medium | 6.2 | 0.5% | - | Fix |
| CVE-2020-21686 | Medium | 5.5 | 0.4% | - | Fix |
| CVE-2026-3591 | Medium | 5.4 | 0.4% | - | Fix |
| CVE-2026-26399 | Medium | 5.3 | 0.2% | - | - |
| CVE-2026-34553 | Medium | 4.0 | 0.2% | - | Fix |
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.