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TI-2021-20235 Aliases CVE-2021-44714GHSA-85x3-59h8-rmrv

Adobe Acrobat Reader Missing Custom Protocols in Warning Message Prompts

Priority LOW 21CWE-657Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Acrobat Reader DC version 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by a Violation of Secure Design Principles that could lead to a Security feature bypass. Acrobat Reader DC displays a warning message when a user clicks on a PDF file, which could be used by an attacker to mislead the user. In affected versions, this warning message does not include custom protocols when used by the sender. User interaction is required to abuse this vulnerability as they would need to click 'allow' on the warning message of a malicious file.

Why it matters now

EPSS 0.025 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
AdobeAcrobat Readerup to 21.007.20099; up to 20.004.30017; up to 17.011.30204; up to None—No fix listedCNA
  • Acrobat Reader VendorAdobe Affected up to 21.007.20099; up to 20.004.30017; up to 17.011.30204; up to None Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*15.008.20082 – 21.007.20099VulnerableAdobe
cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*15.008.20082 – 21.007.20099VulnerableAdobe
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*17.011.30059 – 17.011.30204; 20.001.30005 – 20.004.30017VulnerableAdobe
cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:*17.011.30059 – 17.011.30204; 20.001.30005 – 20.004.30017VulnerableAdobe
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
  • cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* Versions 15.008.20082 – 21.007.20099 Vulnerable ·Adobe
  • cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* Versions 15.008.20082 – 21.007.20099 Vulnerable ·Adobe
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
  • cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:* Versions 17.011.30059 – 17.011.30204; 20.001.30005 – 20.004.30017 Vulnerable ·Adobe
  • cpe:2.3:a:adobe:acrobat_reader:*:*:*:*:classic:*:*:* Versions 17.011.30059 – 17.011.30204; 20.001.30005 – 20.004.30017 Vulnerable ·Adobe
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-44714
  2. 2026-10-03 Alias added: GHSA-85x3-59h8-rmrv

References

Advisory 1

  • TI-2014-00524 Adobe Reader and Acrobat 10.x before 10.1.11 and 11.x before 11.0.08 on Windows allow… KEVCVSS 3.1CRITICAL 9.8
  • TI-2013-02915 Adobe Reader and Acrobat 9.x before 9.5.5, 10.x before 10.1.7, and 11.x before 11.0.03… KEVCVSS 3.1CRITICAL 9.8
  • TI-2013-02389 Integer overflow in Adobe Reader and Acrobat 9.x before 9.5.5, 10.x before 10.1.7, and… KEVCVSS 3.1CRITICAL 9.8
  • TI-2011-02156 Unspecified vulnerability in the U3D component in Adobe Reader and Acrobat 10.1.1 and… KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-09626 Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code execution KEVCVSS 3.1HIGH 8.8
  • TI-2021-04123 Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution KEVCVSS 3.1HIGH 8.8
See all 1413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences