CVE-2021-21086

Adobe Reader CoolType Arbitrary Stack Manipulation

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Write vulnerability in the CoolType library. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected

Adobe · Acrobat Reader

CVSS v3.1 NVD

7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2.0 NVD

6.8 MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS

4.71% chance of exploitation in the next 30 days, 92nd percentile

Published

2021-09-02

Updated

2024-09-17

Proof-of-concept exploits (1)

• infobyte/Exploit-CVE-2021-2108626★ · 2021-12-02

Security advisories

• https://helpx.adobe.com/security/products/acrobat/apsb21-09.html

References

• CVE Record
• NVD entry

Related

• CVE-2016-2776
• CVE-2022-27255
• CVE-2023-21036