# CVE-2026-81994: Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)

CVE-2026-81994 is fixed in 2 products on 2 platforms, first by Adobe Acrobat Reader DC 26.002.21901, released September 7, 2026. 1 other affected product has no fix yet. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-81994
- Priority: Routine
- CVSS: 6.3
- EPSS: 0.0060
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 8, 2026
- Weakness: CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-81994

## Description

Acrobat Reader is affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could lead to arbitrary file system read. An attacker could exploit this vulnerability to access sensitive files and directories outside the intended access scope. Exploitation of this issue requires user interaction in that a victim must open a malicious file. Scope is changed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Adobe Acrobat Reader DC | 26.002.21901 | [Adobe Acrobat Reader DC 26.002.21901](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.32-bit-26.002.21901.md) | Sep 7, 2026 |
| Windows apps | Adobe Acrobat Reader DC (64-bit) | 26.002.21901 | [Adobe Acrobat Reader DC (64-bit) 26.002.21901](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.64-bit-26.002.21901.md) | Sep 7, 2026 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| macOS | Adobe Acrobat Reader | no-fix |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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