(Pwn2Own) Samsung Galaxy S25 Samsung Account Open Redirect Security Bypass Vulnerability

March 23rd, 2026
ZDI-26-225 ZDI-CAN-28457

CVE ID

CVE-2025-58487

CVSS Score

5.6 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Vendors

Samsung

Affected Products

Galaxy S25

Vulnerability Details

This vulnerability allows remote attackers to bypass security on affected installations of Samsung Galaxy S25. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the Samsung Account application. An attacker can force a redirection to a site that serves malicious content. An attacker can leverage this vulnerability to start arbitrary Android exported activites.

Additional Details

Samsung has issued an update to correct this vulnerability. More details can be found at:
https://security.samsungmobile.com/serviceWeb.smsb?year=2025&month=12

Disclosure Timeline

  • 2025-11-20 - Vulnerability reported to vendor
  • 2026-03-23 - Coordinated public release of advisory
  • 2026-03-23 - Advisory Updated

Credit

Ken Gannon / 伊藤 剣 (@yogehi) of Mobile Hacking Lab, and Dimitrios Valsamaras (@Ch0pin)

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