CVE-2023-26369: Adobe Acrobat and Reader Out-of-Bounds Write Vulnerability
- Is it exploited?
Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 14 Sep 2023, 1 day after the CVE record was published.
- How likely is exploitation in the next 30 days?
- 6.7%
EPSS score, percentile 93.9 of all scored records
- How severe?
- 7.8 High
CVSS v3.1 base score, given by the CNA
- What should I do?
Required action (CISA), due 5 Oct 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Which versions are affected?
Affected: 20.005.30514 and earlier
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
What to do
Required action, set by CISA
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date for this action: 5 October 2023.
Advisories and patches
Linked from CISA's catalog entry
- https://helpx.adobe.com/security/products/acrobat/apsb23-34.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-26369
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 20.005.30514 and earlier |
Versions not listed are: affected.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
About this vulnerability
Adobe Acrobat and Reader contains an out-of-bounds write vulnerability that allows for code execution.
Summary: CISA's KEV catalog, as of 28 Oct 2026.
- CISA added CVE-2023-26369 to its Known Exploited Vulnerabilities (KEV) catalog on 14 Sep 2023.
- CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
- The due date CISA sets for the required action is 5 Oct 2023.
- The CVE record was published on 13 Sep 2023, 1 day before it was added to KEV.
- The CVE record carries a CVSS v3.1 base score of 7.8 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 6.7% (percentile 93.9), as of 28 Oct 2026.
- CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.
Description
[Google Project Zero] Adobe Acrobat DC OOBW 0-day actively exploited in the wild
Acrobat Reader versions 23.003.20284 (and earlier), 20.005.30516 (and earlier) and 20.005.30514 (and earlier) are affected by an out-of-bounds write 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.
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Weakness
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.
Timeline
| Date | Event |
|---|---|
| 13 Sep 2023 | CVE record published |
| 14 Sep 2023 | Added to CISA KEV |
| 5 Oct 2023 | CISA due date for the required action |
| 21 Oct 2025 | CVE record last updated |
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