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CVE-2021-40729: Adobe Acrobat Reader DC PDF Out-of-Bound Read Vulnerability Information Disclosure

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-15 · updated 2026-06-17
• Weakness: CWE-125

Description

Adobe Acrobat Reader DC version 21.007.20095 (and earlier), 21.007.20096 (and earlier), 20.004.30015 (and earlier), and 17.011.30202 (and earlier) is affected by a out-of-bounds read vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious PDF file.

Affected products

• Adobe Acrobat for Edge: from 20.001.30005 through 20.004.30015; from 17.011.30158 through 17.011.30202
• Adobe Acrobat DC: from 15.008.20082 through 21.007.20095; from 15.008.20082 through 21.007.20096
• Adobe Acrobat Reader: from 20.001.30005 through 20.004.30015; from 17.011.30158 through 17.011.30202
• Adobe Acrobat Reader: from 15.008.20082 through 21.007.20095; from 15.008.20082 through 21.007.20096

References

• https://helpx.adobe.com/security/products/acrobat/apsb21-104.html
• https://helpx.adobe.com/security/products/acrobat/apsb21-104.html

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