Vulnerability Description
Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must open a maliciously crafted Microsoft Office file, or visit an attacker controlled web page.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Adobe | Acrobat | >= 17.011.30059, <= 17.011.30199 |
| Adobe | Acrobat Reader | >= 17.011.30059, <= 17.011.30199 |
| Apple | Macos | - |
| Microsoft | Windows | - |
| Adobe | Acrobat Dc | >= 15.008.20082, <= 21.005.20058 |
| Adobe | Acrobat Reader Dc | >= 15.008.20082, <= 21.005.20058 |
Related Weaknesses (CWE)
References
- https://helpx.adobe.com/security/products/acrobat/apsb21-55.htmlRelease NotesVendor Advisory
- https://helpx.adobe.com/security/products/acrobat/apsb21-55.htmlRelease NotesVendor Advisory
FAQ
What is CVE-2021-39855?
CVE-2021-39855 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Acrobat Reader DC ActiveX Control versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an Information Disclosure vulnerability. An unaut...
How severe is CVE-2021-39855?
CVE-2021-39855 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-39855?
Check the references section above for vendor advisories and patch information. Affected products include: Adobe Acrobat, Adobe Acrobat Reader, Apple Macos, Microsoft Windows, Adobe Acrobat Dc.