# CVE-2026-81989: Adobe Acrobat Reader use-after-free in parsing

Source: https://junglewise.ai/threats/cve-2026-81989-adobe-acrobat-reader-use-after-free-in-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-81989 · Severity: high · CVSS 7.8 · Published 2026-09-08

Adobe Acrobat Reader is widely used to view and work with PDF documents in business and personal settings. A use-after-free vulnerability allows an attacker to achieve arbitrary code execution when a user opens a specially crafted malicious PDF file, potentially compromising the user's system and data.

Technologies: [Adobe Acrobat](https://junglewise.ai/threats/technologies/acrobat), [Adobe Acrobat Reader](https://junglewise.ai/threats/technologies/acrobat-reader), [Adobe Acrobat Dc](https://junglewise.ai/threats/technologies/acrobat-dc), [Adobe Acrobat Reader Dc](https://junglewise.ai/threats/technologies/acrobat-reader-dc), [Apple macOS](https://junglewise.ai/threats/technologies/macos), [Microsoft Windows](https://junglewise.ai/threats/technologies/windows). Vendors: [Adobe](https://junglewise.ai/threats/vendors/adobe), [Apple](https://junglewise.ai/threats/vendors/apple), [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-81989 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81989 being exploited in the wild.

**How severe is CVE-2026-81989?** High severity, with a CVSS score of 7.8, published 8 September 2026.

**Which products and versions are affected?** Adobe Acrobat Reader <UNKNOWN>.

**Is there a fix for CVE-2026-81989?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-81989 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-81989?** Check whether you run Adobe Acrobat, Adobe Acrobat Reader, Adobe Acrobat Dc or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free vulnerability exists in Adobe Acrobat Reader's document parsing logic. The flaw allows an attacker to trigger memory corruption by referencing freed memory during file processing. Exploitation requires user interaction—specifically, the victim must open a malicious PDF file. When triggered, the vulnerability permits arbitrary code execution in the security context of the current user. No patch information is currently available from the provided advisory.

## Affected products

- Adobe Acrobat Reader <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://helpx.adobe.com/security/products/acrobat/apsb26-141.html](https://helpx.adobe.com/security/products/acrobat/apsb26-141.html)

## Related threats

- [Windows BitLocker heap buffer overflow with physical attack](https://junglewise.ai/threats/cve-2026-97015-heap-based-buffer-overflow-in-windows-bitlocker-allows-an)
- [Microsoft Windows Shell type confusion privilege elevation](https://junglewise.ai/threats/cve-2026-97013-access-of-resource-using-incompatible-type-type-confusion-in)
- [Microsoft Windows VMSwitch out-of-bounds read privilege escalation](https://junglewise.ai/threats/cve-2026-97002-out-of-bounds-read-in-windows-vmswitch-allows-an-authorized)
- [Microsoft Windows USM Communication Manager null pointer dereference](https://junglewise.ai/threats/cve-2026-97000-null-pointer-dereference-in-windows-usm-communication-manager)
- [Microsoft Windows Winsock use after free privilege escalation](https://junglewise.ai/threats/cve-2026-96994-use-after-free-in-winsock-allows-an-authorized-attacker-to)