Adobe Acrobat and Reader Flaws Enable Code Execution via Malicious Files
JPCERT/CC warned that multiple vulnerabilities in Adobe Acrobat and Adobe Acrobat Reader could lead to arbitrary code execution on both Windows and macOS, including flaws tracked in Adobe bulletins APSB26-43 and APSB26-44. Adobe said exploitation of the APSB26-43 issues has been confirmed, while JPCERT/CC noted it had not observed attacks in Japan at publication time and cautioned that broader abuse could follow as technical details spread.
The affected products include Adobe Acrobat DC Continuous, Adobe Acrobat Reader DC Continuous, and Adobe Acrobat 2024 Classic up to the vulnerable versions identified by Adobe. JPCERT/CC urged organizations and users to update immediately to the latest patched releases, including 26.001.21431 for the DC Continuous branch and 24.001.30365 for Acrobat 2024 Classic, because opening maliciously crafted content may be enough to trigger remote code execution.
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How this story unfolded
4 events from the most recent confirmed update back to the earliest known activity.
JPCERT/CC publishes advisory for APSB26-44 vulnerabilities
On 2026-04-15, JPCERT/CC published advisory JPCERT-AT-2026-0011 about the APSB26-44 vulnerabilities affecting Acrobat and Reader on Windows and macOS. The advisory recommended updating via Adobe's latest releases or manual installer downloads.
Adobe releases APSB26-44 patches for additional Acrobat and Reader flaws
Adobe issued bulletin APSB26-44 for additional Adobe Acrobat and Adobe Acrobat Reader vulnerabilities that could allow arbitrary code execution when users open maliciously crafted content. Patched versions included 26.001.21431 for the DC Continuous branch and 24.001.30365 for Acrobat 2024 Classic 2024.
JPCERT/CC warns Japan users about APSB26-43 vulnerabilities
On 2026-04-13, JPCERT/CC published advisory JPCERT-AT-2026-0009 warning about the APSB26-43 Acrobat and Reader flaws. It said it had not confirmed domestic exploitation in Japan at publication time and urged immediate updating because the products are widely used.
Adobe confirms exploited Acrobat and Reader flaws in APSB26-43
Adobe disclosed security bulletin APSB26-43 covering vulnerabilities in Adobe Acrobat and Adobe Acrobat Reader that could allow arbitrary code execution. Adobe stated that exploitation of these vulnerabilities had been confirmed in the wild.
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Multiple Adobe Acrobat and Reader Flaws Enable Code Execution and Information Disclosure
German authorities issued security advisories for **Adobe Acrobat DC**, **Acrobat Reader DC**, and **Adobe Acrobat Reader** covering multiple vulnerabilities that could allow **information disclosure** and **arbitrary code execution**. One advisory specifically warned that a flaw in Adobe Acrobat Reader could expose sensitive information and be leveraged for code execution, raising the risk of compromise when users open maliciously crafted PDF files. A follow-up advisory expanded the scope to **multiple vulnerabilities** across Adobe’s Acrobat product line, indicating broader exposure for enterprise and end-user systems that rely on Adobe PDF software. Organizations using affected Adobe applications should prioritize vendor patches and review endpoint protections, as successful exploitation could give attackers access to data or the ability to run code on targeted systems.
Apr 15, 2026
Adobe Acrobat Reader Prototype Pollution Flaws Enable Code Execution
Adobe disclosed two high-severity prototype pollution vulnerabilities in **Acrobat Reader** tracked as `CVE-2026-34621` and `CVE-2026-34622`. Both flaws can lead to arbitrary code execution in the context of the current user if a victim opens a malicious file, making user interaction a required condition for exploitation. Adobe classified both issues under `CWE-1321` and assigned CVSS v3.1 vectors indicating high impact to confidentiality, integrity, and availability. `CVE-2026-34621` affects Acrobat Reader versions `24.001.30356`, `26.001.21367`, and earlier, while `CVE-2026-34622` affects versions `26.001.21411`, `24.001.30360`, `24.001.30362`, and earlier. The disclosures indicate the vulnerabilities were reported to Adobe's PSIRT and published with advisory references, signaling that organizations using Acrobat Reader should identify exposed versions and prioritize updates to reduce the risk of malicious document-based compromise.
Apr 23, 2026
Adobe fixes critical flaws across Acrobat, ColdFusion, Experience Manager, and Campaign
Adobe released a broad set of security updates covering **Adobe Experience Manager**, **Acrobat/Reader**, **ColdFusion**, **Dreamweaver**, **InDesign**, **InCopy**, **Substance 3D Sampler**, **Format Plugins**, **Campaign Classic**, and Content Credentials SDK components, prompting alerts from national and regional CERTs including Canada’s Cyber Centre and HKCERT. The advisories span multiple high-severity issues, with affected versions including **ColdFusion 2023.19 and 2025.8 and earlier**, **Dreamweaver 21.7 and earlier**, **Campaign Classic 7.4.3 build 9394 and earlier**, and **AEM Forms JEE LTS SP1 / 6.5.24.0 and earlier**. The most serious disclosures include multiple **remote code execution** bugs in Acrobat/Reader such as `CVE-2026-47911`, `CVE-2026-47912`, `CVE-2026-47913`, `CVE-2026-47914`, `CVE-2026-47915`, `CVE-2026-47918`, and `CVE-2026-47919`, largely tied to use-after-free conditions and malicious file handling; several **ColdFusion** flaws including `CVE-2026-47928`, `CVE-2026-47929`, `CVE-2026-47930`, `CVE-2026-47931`, and `CVE-2026-47932` that can enable code execution, security feature bypass, or unauthorized read/write access; **AEM Forms JEE** stored and reflected XSS issues `CVE-2026-34691` and `CVE-2026-34693`; **Campaign Classic** issues `CVE-2026-47938` and `CVE-2026-48303` involving SSRF, privilege escalation, and possible code execution; **Dreamweaver** arbitrary file read via `CVE-2026-47907`; and **USD Fileformat Plugins** heap-based buffer overflows `CVE-2026-48291` and `CVE-2026-48292`. Adobe has issued patches for the affected products, and defenders are being urged to review the vendor bulletins and deploy updates quickly.
Jun 12, 2026