CVE-2026-82001 in Acrobat Reader
Summary
by MITRE • 09/09/2026
Acrobat Reader is affected by an Uncontrolled Resource Consumption vulnerability that could lead to application denial-of-service. An attacker could exploit this vulnerability to exhaust system resources, resulting in an application denial-of-service condition. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 09/09/2026
The identified vulnerability represents a classic uncontrolled resource consumption flaw within Adobe Acrobat Reader, categorized under the Common Weakness Enumeration standard as CWE-400. This type of weakness occurs when an application does not properly control the allocation and maintenance of limited system resources such as memory, CPU cycles, or file handles. In this specific instance, the vulnerability allows for a denial-of-service condition by enabling an attacker to exhaust critical system resources through the processing of specially crafted input data. The core technical flaw lies in the software's failure to implement adequate limits on resource usage during the parsing and rendering of document content, allowing maliciously constructed files to trigger infinite loops or excessive memory allocation patterns that overwhelm the application's capacity to manage its internal state effectively.
From an operational perspective, this vulnerability poses a significant risk to system stability and availability rather than data confidentiality or integrity. When exploited, the primary impact is the degradation or complete cessation of service provided by Acrobat Reader. An attacker can leverage this flaw to cause the application to become unresponsive or crash entirely, thereby denying legitimate users access to critical documents. This denial-of-service condition may also lead to broader system instability if the resource exhaustion affects shared memory pools or causes cascading failures in dependent processes. The severity of the impact is compounded by the fact that modern computing environments often rely on continuous availability for productivity and business operations, making even a localized application crash disruptive to workflow continuity.
The exploitation vector for this vulnerability requires direct user interaction, which aligns with typical attack patterns observed in social engineering campaigns targeting document-based software vulnerabilities. Specifically, as noted in the MITRE ATT&CK framework under techniques related to Initial Access such as Spearphishing Attachment or Drive-by Compromise variants that rely on user action, a victim must actively open a malicious file for the exploit to trigger. This requirement means that while automated remote exploitation is not feasible without additional vulnerabilities, targeted attacks using deceptive documents can successfully deliver the payload. The attacker typically crafts a PDF or related document format containing malformed objects designed to consume excessive resources upon rendering, relying on the user's trust in the source of the file to initiate the processing chain that leads to resource exhaustion.
Mitigation strategies for this vulnerability primarily involve maintaining strict software hygiene and adhering to defense-in-depth principles recommended by industry standards such as NIST SP 800-53. Organizations should ensure that Adobe Acrobat Reader is updated to the latest version, where patches typically include logic changes to enforce stricter limits on resource consumption during document parsing. Additionally, implementing application whitelisting or sandboxing solutions can restrict the privileges of Acrobat Reader, limiting the impact of any potential denial-of-service event by containing it within a restricted environment. Users should be educated to exercise caution when opening documents from untrusted sources and to verify the legitimacy of attachments before interaction, thereby reducing the attack surface available for this user-interaction-dependent exploit.