Quick answers
- Is CVE-2026-21134 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-21134 being exploited in the wild.
- How severe is CVE-2026-21134?
- Informational severity, published 12 October 2026.
- Which products and versions are affected?
- Samsung Flow prior to 4.9.22.4.
- Is there a fix for CVE-2026-21134?
- Yes: fixed in 4.9.22.4. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-21134 attacked?
- It is attacked from the adjacent network, in a hosted service.
- Am I affected by CVE-2026-21134?
- Check whether you run Samsung Flow 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: 4.9.22.4
Technical details
The vulnerability stems from improper authentication checks in Samsung Flow, allowing adjacent network attackers to bypass authentication mechanisms and access sensitive data. The attack requires network proximity (adjacent network access) but no user interaction or prior authentication. A fix is available in version 4.9.22.4 and later.
Affected products
- Samsung Flow prior to 4.9.22.4
Timeline
- 2026-10-12: disclosed