CVE-2023-21608: Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.3041
Summary
Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.30418 (and earlier) are affected by a Use After Free vulnerability that could result in arbitrary code execution 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
HIGH severity — known to be exploited in the wild（CISA KEV）；action required: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. .
Current Status
- Vulnerability status: Known exploited (CISA KEV)
- Last intelligence update: 2026-06-17 · source: NVD
- CISA KEV added: 2023-10-10 · remediation deadline: 2023-10-31
Entity Activity Timeline
- 2023-10-10 — Added to CISA KEV as known-exploited · action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- 2023-01-18 — NVD publication / disclosure
- 2026-06-17 — Intelligence record updated（NVD sync）
Severity
HIGH
CVSS Score: 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Known Exploited (CISA KEV)
Known Exploited Vulnerability
Added: 2023-10-10 · Remediation deadline: 2023-10-31
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Source Attribution
Source: NVD · Updated: 2026-06-17T05:33:17.210 · Confidence: high
Impact
Based on CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H — assess confidentiality, integrity, and availability impact via the official vector documentation.
Affected Software
Fix
Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.
Sources & Evidence
Export threat intelligence
Download an OASIS STIX 2.1 threat-intelligence bundle (JSON) for MISP / OpenCTI / TAXII import
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- Question — what do you need to know about CVE-2023-21608: Adobe Acrobat Reader versions 22.003.20282 (and earlier), 22.003.20281 (and earlier) and 20.005.3041?
- Evidence — assertions mapped to verifiable references.
- Timeline — events in chronological order.
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- Sources — NVD, CISA KEV, MITRE ATT&CK, vendor advisories.
- Notes — your own observations and working hypotheses.
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