# CVE-2026-81982: Adobe Acrobat Reader out-of-bounds read in PDF parsing

Source: https://junglewise.ai/threats/cve-2026-81982-adobe-acrobat-reader-out-of-bounds-read-in-pdf-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-2026-81982 · Severity: medium · CVSS 5.5 · Published 2026-09-08

Acrobat Reader, the widely-used tool for viewing PDF documents, contains an out-of-bounds read vulnerability that can expose sensitive information from the application's memory. An attacker can exploit this by crafting a malicious PDF file that, when opened by a user, leaks confidential data such as passwords, encryption keys, or other sensitive information stored in memory.

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-2026-81982 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81982 being exploited in the wild.

**How severe is CVE-2026-81982?** Medium severity, with a CVSS score of 5.5, published 8 September 2026.

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

**Is there a fix for CVE-2026-81982?** 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-2026-81982 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-81982?** Check whether you run Adobe Acrobat, Adobe Acrobat Reader, Adobe Acrobat Dc or one of the others listed. 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

The vulnerability is an out-of-bounds read in Acrobat Reader's PDF parsing engine. The root cause is improper bounds checking when reading data structures within a PDF file. Exploitation requires user interaction: a victim must open a specially crafted malicious PDF document. A successful exploit allows an attacker to read arbitrary memory regions, potentially disclosing sensitive information such as cryptographic keys, passwords, or other confidential data. The attack is limited to information disclosure and does not enable code execution or system compromise.

## Affected products

- Adobe Acrobat Reader

## 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)