PT-2021-2327 · Adobe · Acrobat+1

Published 2021-02-09 · Updated 2025-10-23 · CVE-2021-21017

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Adobe Acrobat and Reader versions 2020.013.20074 and earlier, 2020.001.30018 and earlier, 2017.011.30188 and earlier

Description A heap-based buffer overflow vulnerability exists, allowing an unauthenticated attacker to achieve arbitrary code execution in the context of the current user. Exploitation requires user interaction, where a victim must open a malicious file. This can be done using a specially crafted PDF file.

Recommendations For versions 2020.013.20074 and earlier, 2020.001.30018 and earlier, 2017.011.30188 and earlier, update to a version that is not affected by this issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Heap Based Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-122

CWE-787

Related Identifiers

BDU:2021-01562

CVE-2021-21017

Affected Products

Acrobat

Reader

References · 12

• 🔥 https://github.com/ZeusBox/CVE-2021-21017 · Exploit
• https://helpx.adobe.com/security/products/acrobat/apsb21-09.html · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/661681 · Security Note
• https://bdu.fstec.ru/vul/2021-01562 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21017 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21017 · Security Note
• https://t.me/cibsecurity/23482 · Telegram Post
• https://cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-21017 · Note
• https://t.me/cveNotify/140015 · Telegram Post
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21017 · Note
• https://cisa.gov/known-exploited-vulnerabilities-catalog · Note
• https://t.me/cybersecuritytechnologies/2708 · Telegram Post