Acrobat
CVE-2026-27221
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V12 - Secure Communication Certificate validation
|
| Impact | CVSS 5.5 (MEDIUM). Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to a Security feature bypass. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Improper certificate validation in Adobe Acrobat Reader DC versions 24.001.30307 and earlier allows local attackers to forge digital signatures by spoofing signer identity, bypassing security features that users rely on for document verification. This attack requires user interaction and affects multiple Adobe products including Acrobat DC. No patch is currently available.
Earlier versions of this analysis (1)
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. [CVSS 5.5 MEDIUM]
RemediationAI
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Affects your stack
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Technical ContextAI · show details
Classified as CWE-295 (Improper Certificate Validation). Affects Acrobat Dc. Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Primary rating from Vendor (adobe) · only source for this CVE.
CVSS VectorVendor: adobe
DescriptionCVE.org
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
Executive ViewAI
CVE-2026-27221 presents moderate security risk rated CVSS 5.5. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
Adobe Flash Player contains a type confusion vulnerability in object handling that allows remote attackers to execute ar
Adobe Reader and Acrobat contain a use-after-free vulnerability in the Doc.media.newPlayer JavaScript method that was ac
Adobe Flash Player 10.2 and earlier across all platforms contain an unspecified vulnerability allowing remote code execu
Integer overflow in Adobe Reader and Acrobat 9.x before 9.5.5, 10.x before 10.1.7, and 11.x before 11.0.03 allows attack
Adobe Reader and Acrobat 9.x before 9.5.4, 10.x before 10.1.6, and 11.x before 11.0.02 allow remote attackers to execute
Buffer overflow in Adobe Reader and Acrobat 9.x before 9.5.4, 10.x before 10.1.6, and 11.x before 11.0.02 allows remote
Buffer overflow in Adobe Reader and Acrobat 9.x before 9.5.5, 10.x before 10.1.7, and 11.x before 11.0.03 allows attacke
Prototype pollution in Adobe Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier enables arbitrary code execu
Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allow attackers to bypass inten
Multiple heap-based buffer overflows in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows
Buffer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attacke
Buffer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attacke
GitHub PoC
Exploit-DB