Quick answers
- Is CVE-2026-21124 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21124 being exploited in the wild.
- How severe is CVE-2026-21124?
- Informational severity, published 12 October 2026.
- Which products and versions are affected?
- Samsung Android firmware prior to SMR Oct-2026 Release 1.
- Is there a fix for CVE-2026-21124?
- Yes: fixed in SMR Oct-2026 Release 1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-21124 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-21124?
- Check whether you run Samsung Android firmware 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.
How to fix
- Fixed in: SMR Oct-2026 Release 1
Technical details
An improper input validation weakness exists in the libsimba.heifdec.media.samsung.so library's cover image processing function. The vulnerability allows local attackers to trigger arbitrary code execution through a malformed HEIF image file. No public exploit is known at this time.
Affected products
- Samsung Android firmware prior to SMR Oct-2026 Release 1
Timeline
- 2026-10-12: disclosed