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PatchSiren cyber security CVE debrief

CVE-2023-26369 Adobe CVE debrief

CVE-2023-26369 is an Adobe Acrobat and Reader out-of-bounds write vulnerability that CISA added to the Known Exploited Vulnerabilities catalog on 2023-09-14. Because it is on the KEV list, defenders should treat it as a high-priority remediation item and follow Adobe’s guidance or stop using the product if mitigations are not available.

Vendor
Adobe
Product
Acrobat and Reader
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-09-14
Original CVE updated
2023-09-14
Advisory published
2023-09-14
Advisory updated
2023-09-14

Who should care

Security teams managing Adobe Acrobat or Reader deployments, endpoint operations, vulnerability management, and incident response teams should prioritize this CVE because CISA has identified it as known exploited.

Technical summary

The published description identifies an out-of-bounds write condition in Adobe Acrobat and Reader. The supplied corpus does not include deeper exploitation mechanics or impact details, but CISA’s KEV listing indicates the issue is known to be exploited and therefore warrants accelerated remediation.

Defensive priority

Urgent. Known exploited vulnerabilities should be remediated as soon as possible, with the CISA due date of 2023-10-05 used as a strong operational deadline from the supplied timeline.

Recommended defensive actions

  • Apply Adobe’s mitigations or security update guidance referenced by CISA as soon as possible.
  • If mitigations are unavailable, discontinue use of the affected product until a safe version or workaround is in place.
  • Inventory all Acrobat and Reader installations to identify exposure across endpoints and VDI images.
  • Prioritize remediation on internet-facing, high-privilege, and frequently used user endpoints.
  • Validate that vulnerability management and patch compliance reporting reflect this CVE before the CISA due date.

Evidence notes

CISA’s Known Exploited Vulnerabilities catalog lists this Adobe Acrobat and Reader issue with dateAdded 2023-09-14 and dueDate 2023-10-05. The source item notes reference Adobe’s security advisory page and the NVD record, but the supplied corpus does not include the advisory text or a CVSS score.

Official resources

Publicly disclosed CVE and public CISA KEV listing dated 2023-09-14; no exploit instructions or reproduction details included.