EUVD-2026-35817
GHSA-77hv-x6q3-c6j4
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
Acrobat Reader versions 24.001.30365, 26.001.21651 and earlier are affected by a Use After Free vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Articles & Coverage 1
AnalysisAI
Arbitrary code execution in Adobe Acrobat Reader (versions 24.001.30365, 26.001.21651, and earlier) is possible when a victim opens a maliciously crafted document, triggering a use-after-free condition in the renderer. The flaw runs code in the context of the current user and has no public exploit identified at time of analysis, though Adobe issued advisory APSB26-63 confirming the vulnerability class and affected versions.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open a maliciously crafted PDF file in a vulnerable Acrobat Reader build (24.001.30365, 26.001.21651, or earlier) - user interaction is required per UI:R in the CVSS vector and explicit in the description. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects a local attack vector with required user interaction - meaning the victim must open the malicious file - rather than a remote network exploit; this is standard for client-side document parsers and limits drive-by exposure compared to server CVEs. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious PDF that manipulates Acrobat Reader's object lifecycle to free an object while a pointer to it remains live, then reclaims the freed memory with attacker-controlled data via heap spraying (using JavaScript or embedded streams). The PDF is delivered via spear-phishing email or a watering-hole download; when the victim double-clicks the document, the dangling pointer is dereferenced, control flow is hijacked, and shellcode executes as the user - typically dropping a second-stage implant. … |
| Remediation | Apply the patched build identified in Adobe Security Bulletin APSB26-63 (https://helpx.adobe.com/security/products/acrobat/apsb26-63.html) - patch available per vendor advisory; consult the bulletin for the exact fixed version numbers for the 24.x and 26.x update tracks on your platform. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Disable or restrict Adobe Acrobat Reader in user environments; direct employees to alternative PDF viewers (built-in browser PDF readers, free alternatives). …
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External POC / Exploit Code
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