# CVE-2021-44739: Adobe Acrobat Reader DC add-on (AxAcroPDFLib.AxAcroPDF) src NTLMv2 SSO Auth leak vulnerability

CVE-2021-44739 is fixed in 2 products on 1 platform, first by Adobe Acrobat Reader DC 21.011.20039, released December 24, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-44739
- Priority: Routine
- CVSS: 4.3
- EPSS: 0.0203
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 14, 2022
- Weakness: CWE-200: Information Exposure (CWE-200)
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2021-44739

## Description

Acrobat Reader DC ActiveX Control versions 21.007.20099 (and earlier), 20.004.30017 (and earlier) and 17.011.30204 (and earlier) are affected by an Information Disclosure vulnerability. An unauthenticated attacker could leverage this vulnerability to obtain NTLMv2 credentials. Exploitation of this issue requires user interaction in that a victim must open a maliciously crafted Microsoft Office file, or visit an attacker controlled web page.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Adobe Acrobat Reader DC | 21.011.20039 | [Adobe Acrobat Reader DC 21.011.20039](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.32-bit-21.011.20039.md) | Dec 24, 2021 |
| Windows apps | Adobe Acrobat Reader DC (64-bit) | 21.011.20039 | [Adobe Acrobat Reader DC (64-bit) 21.011.20039](https://patchblox.com/security/data/fix/windows-app/adobe.acrobat.reader.64-bit-21.011.20039.md) | Dec 24, 2021 |

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Data as of 2026-11-08T13:06:02Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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