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CVE-2021-40725: Adobe Acrobat Reader DC AcroForm listbox Use-After-Free Remote Code Execution Vulnerability

• Severity: medium (CVSS 6.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-07 · updated 2026-06-17
• Weakness: CWE-416

Description

Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability when processing AcroForm listbox that could result in arbitrary code execution in the context of the current user. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

Affected products

• Adobe Acrobat DC: from 17.011.30059 through 17.011.30199; from 20.001.30005 through 20.004.30006; from 15.008.20082 through 21.005.20058; from 15.008.20082 through 21.005.20060
• Adobe Acrobat Reader: from 17.011.30059 through 17.011.30199; from 20.001.30005 through 20.004.30006; from 15.008.20082 through 21.005.20058; from 15.008.20082 through 21.005.20060

References

• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
• https://www.zerodayinitiative.com/advisories/ZDI-21-1250/
• https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
• https://www.zerodayinitiative.com/advisories/ZDI-21-1250/

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