Quick answers
- Is CVE-2026-21358 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21358 being exploited in the wild.
- How severe is CVE-2026-21358?
- Medium severity, with a CVSS score of 5.5, 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-2026-21358?
- 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-2026-21358 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-21358?
- 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
This is a heap-based buffer overflow vulnerability in Adobe InDesign Desktop that occurs when processing maliciously crafted input. The vulnerability is reachable through user interaction—specifically by opening a malicious file—and does not require authentication or network connectivity. Successful exploitation results in denial-of-service by crashing the application; arbitrary code execution is not confirmed. Adobe has released patches to address this vulnerability in versions after 21.1 and 20.5.1.
Affected products
- Adobe InDesign Desktop 21.1, 20.5.1 and earlier
Timeline
- 2026-02-10: disclosed