# CVE-2026-21036: Samsung Internet improper authorization allows local data access

Source: https://junglewise.ai/threats/cve-2026-21036-samsung-internet-improper-authorization-allows-local-data-access  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-05. Updated: 2026-06-05  
License: CC BY 4.0 with a link back

CVE-2026-21036 · Severity: info · CVSS 6.3 · Published 2026-06-05

Samsung Internet is a mobile web browser used on Samsung devices. A security flaw in versions prior to 30.0.0.39 could allow a malicious application installed on the same device to bypass security checks and access sensitive user information. This could lead to the exposure of private browsing data or other personal information stored within the browser.

Technologies: [Samsung Internet](https://junglewise.ai/threats/technologies/internet). Vendors: [Samsung](https://junglewise.ai/threats/vendors/samsung).

## Quick answers

**Is CVE-2026-21036 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-21036 being exploited in the wild.

**How severe is CVE-2026-21036?** Informational severity, with a CVSS score of 6.3, published 5 June 2026.

**Which products and versions are affected?** Samsung Internet prior to 30.0.0.39.

**Is there a fix for CVE-2026-21036?** 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-2026-21036 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-21036?** Check whether you run Samsung Internet 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

An improper authorization vulnerability exists in the Samsung Internet browser application. The flaw allows a local attacker with low privileges to bypass authorization mechanisms and gain access to sensitive information. The vulnerability is triggered locally on the device and does not require user interaction. Samsung has addressed this issue in version 30.0.0.39 by implementing proper authorization checks. The CVSS 4.0 score of 6.3 reflects a medium severity impact, primarily affecting the confidentiality of local data.

## Affected products

- Samsung Internet prior to 30.0.0.39

## Timeline

- 2026-06-02: advisory: Samsung published the initial security bulletin.
- 2026-06-05: disclosed: CVE record published and NVD dataset updated.

## References

- [https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=06](https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=06)

## Related threats

- [Samsung Internet improper access control allows local information access](https://junglewise.ai/threats/cve-2026-21135-improper-access-control-in-samsung-internet-prior-to-version-30-0)
- [Samsung Internet improper input validation script injection](https://junglewise.ai/threats/cve-2026-21132-improper-input-validation-in-samsung-internet-prior-to-version-30)
- [Improper input validation in Samsung Internet prior to version 29.0.0.48 allows local attackers to inject arbitrary script.](https://junglewise.ai/threats/cve-2025-58485-improper-input-validation-in-samsung-internet-prior-to-version-29)