Quick answers
- Is CVE-2026-21357 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21357 being exploited in the wild.
- How severe is CVE-2026-21357?
- High severity, with a CVSS score of 7.8, published 10 February 2026.
- Which products and versions are affected?
- Adobe InDesign Desktop 21.1, 20.5.1 and earlier.
- Is there a fix for CVE-2026-21357?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-21357 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-21357?
- Check whether you run Adobe InDesign Desktop at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a heap-based buffer overflow in InDesign Desktop versions 21.1, 20.5.1 and earlier. The flaw can be exploited through user interaction—specifically, by inducing a victim to open a malicious file. Successful exploitation allows arbitrary code execution with the privileges of the current user. The vulnerability requires no network access or authentication, but depends on social engineering to deliver the malicious file. Adobe has assigned this a CVSS score of 7.8. A patch is available through Adobe's security advisory APSB26-17.
Affected products
- Adobe InDesign Desktop 21.1, 20.5.1 and earlier
Timeline
- 2026-02-10: disclosed