CVE-2026-80162 in Acrobat
Summary
by MITRE • 09/09/2026
Acrobat Reader is affected by a Use After Free vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
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Analysis
by VulDB Data Team • 09/09/2026
The identified vulnerability represents a critical security flaw within Adobe Acrobat Reader, specifically categorized as a Use After Free error. This type of memory corruption defect occurs when software continues to use a pointer after the memory it references has been reallocated or freed by the system. In this specific instance, the application fails to properly manage the lifecycle of certain objects in memory, allowing an attacker to access and read data from previously deallocated regions. The primary consequence of such a flaw is the unauthorized disclosure of sensitive information residing in the victim's memory space. This can include credentials, encryption keys, session tokens, or other proprietary data that was present at the time of exploitation, thereby compromising the confidentiality integrity of the system.
From an operational perspective, this vulnerability poses a significant risk to end-users who rely on Acrobat Reader for viewing and managing PDF documents. The attack vector is primarily social engineering based, requiring direct user interaction to trigger the exploit. Specifically, a victim must open or download a maliciously crafted file that contains the exploitable code embedded within its structure. Once opened, the malformed content triggers the memory management error in Adobe Acrobat Reader, leading to the potential leakage of sensitive data without any further action from the user. This reliance on user interaction highlights the importance of security awareness training alongside technical controls, as even robust software vulnerabilities can be mitigated by preventing users from opening untrusted documents.
In terms of industry standards and threat modeling, this vulnerability aligns with CWE-416, which defines Use After Free errors where a pointer is used after it has been freed. The exploitation technique falls under the MITRE ATT&CK framework category of Initial Access, specifically leveraging valid accounts or credentials through crafted files, often associated with techniques like Spearphishing Attachment if delivered via email. Furthermore, the impact on confidentiality maps to CWE-200, which covers Exposure of Sensitive Information to an Unauthorized Actor. Understanding these classifications helps security teams prioritize remediation efforts and align their defense strategies with established best practices for mitigating memory corruption vulnerabilities in document viewing applications.
To mitigate this risk, organizations should ensure that Adobe Acrobat Reader is updated to the latest version available from Adobe, as patches are typically released promptly following the disclosure of such critical flaws. Additionally, implementing application control policies can restrict the execution of untrusted scripts or macros within PDF files. Users must be educated on recognizing suspicious attachments and avoiding opening documents from unknown sources. Network-level defenses such as sandboxing solutions that analyze document behavior before allowing full access to the host system can also provide an additional layer of protection against exploitation attempts targeting this specific memory corruption flaw.