Out-of-bounds Read in Adobe Indesign
CVE-2026-21278
InDesign Desktop versions 21.0, 19.5.5 and earlier are affected by an Out-of-bounds Read vulnerability that could lead to memory exposure. An attacker could leverage this vulnerability to access sensitive information stored in memory. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Vulnerability class: Buffer Overflow
EPSS: 0.002 (9.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- psirt@adobe.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-21278?
- CVE-2026-21278 is a medium-severity vulnerability in Adobe Indesign, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-01-13.
- How severe is CVE-2026-21278?
- Medium severity. CVSS v3 base score is 5.5 out of 10.