Adobe Acrobat Reader DC URI Parsing Out-Of-Bounds Read
Priority LOW 20CWE-125Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an out-of-bounds Read vulnerability. An unauthenticated attacker could leverage this vulnerability to locally escalate privileges in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Why it matters now
EPSS 0.01868 79th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Adobe | Acrobat Reader | up to 2020.013.20074; up to 2020.001.30018; up to 2017.011.30188; up to None | — | No fix listed | CNA |
- Acrobat Reader VendorAdobe Affected up to 2020.013.20074; up to 2020.001.30018; up to 2017.011.30188; up to None Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* | 20.006.20034 – 20.013.20074 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* | 20.006.20034 – 20.013.20074 | Vulnerable | Adobe |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Apple |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* | 20.001.30005 – 20.001.30018 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* | 20.001.30005 – 20.001.30018 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* | 17.011.30158 – 17.011.30188 | Vulnerable | Adobe |
| cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* | 17.011.30158 – 17.011.30188 | Vulnerable | Adobe |
- cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:* Versions 20.006.20034 – 20.013.20074 Vulnerable ·Adobe
- cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:* Versions 20.006.20034 – 20.013.20074 Vulnerable ·Adobe
- cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* Versions 20.001.30005 – 20.001.30018 Vulnerable ·Adobe
- cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* Versions 20.001.30005 – 20.001.30018 Vulnerable ·Adobe
- cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:* Versions 17.011.30158 – 17.011.30188 Vulnerable ·Adobe
- cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:* Versions 17.011.30158 – 17.011.30188 Vulnerable ·Adobe
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-21089
- 2026-10-03 Alias added: GHSA-4q2c-cjx7-rc9r
References
More Adobe Acrobat Dc vulnerabilities
- TI-2021-09626 Adobe Acrobat Reader use after free vulnerability could lead to arbitrary code execution KEVCVSS 3.1HIGH 8.8
- TI-2021-04123 Acrobat Reader DC Heap-based Buffer Overflow Vulnerability Could Lead To Arbitrary Code Execution KEVCVSS 3.1HIGH 8.8
- TI-2018-03558 Double free in Adobe Acrobat and Reader 2018.011.20038 and earlier, 2017.011.30079 and… KEVCVSS 3.1HIGH 8.8
- TI-2026-26867 Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321) KEVCVSS 3.1HIGH 8.6
- TI-2023-11518 [Google Project Zero] Adobe Acrobat DC OOBW 0-day actively exploited in the wild KEVCVSS 3.1HIGH 7.8
- TI-2023-07999 Adobe Acrobat Reader DC resetForm Use-After-Free Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2021-21089 · CVE Program
- CVE-2021-21089 · NVD
- FIRST EPSS
- GHSA-4q2c-cjx7-rc9r · GitHub Advisory Database · CC BY 4.0
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