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 Buffer Overflow vulnerability when parsing a specially crafted PDF file. 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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Adobe | Acrobat Reader | unspecified – ≤ DC 2021 July, unspecified – ≤ 20.0-Classic 2021 July, unspecified – ≤ 17.0-Classic 2021 July, unspecified – ≤ None | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
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lsw29475/CVE-2021-39863 ★ 2 · Dec 12, 2021
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WHS-SEGFAULT/CVE-2021-39863 ★ 1 · Aug 13, 2024
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.