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CVE-2026-20994 Samsung Mobile CVE debrief

A URL redirection vulnerability in Samsung Account prior to version 15.5.01.1 allows local attackers to potentially obtain access tokens. The vulnerability, published March 16, 2026 and last modified May 20, 2026, stems from improper URL redirection handling (CWE-601) that could enable token theft by a local, unprivileged attacker. The CVSS 4.0 vector indicates local attack vector with low attack complexity, no privileges required, and high confidentiality impact to the vulnerable component. Samsung has addressed this in version 15.5.01.1. Organizations should ensure Samsung Account is updated to 15.5.01.1 or later and monitor for unauthorized access token usage.

Vendor
Samsung Mobile
Product
Samsung Account
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-16
Original CVE updated
2026-05-20
Advisory published
2026-03-16
Advisory updated
2026-05-20

Who should care

Organizations managing Samsung mobile devices, mobile device management (MDM) administrators, security teams responsible for Android enterprise deployments, and users of Samsung Account services on mobile devices.

Technical summary

The vulnerability exists in URL redirection handling within Samsung Account before version 15.5.01.1. A local attacker can exploit improper redirection controls (CWE-601) to intercept or redirect authentication flows, potentially capturing access tokens. The attack requires local access but no user interaction or privileges. The CVSS 4.0 score of 6.9 reflects high confidentiality impact with low attack complexity. Samsung's security bulletin confirms remediation in version 15.5.01.1.

Defensive priority

medium

Recommended defensive actions

  • Update Samsung Account to version 15.5.01.1 or later on all affected devices
  • Audit Samsung Account installations to identify versions prior to 15.5.01.1
  • Monitor authentication logs for anomalous access token usage patterns
  • Review application permissions for Samsung Account to ensure principle of least privilege
  • Subscribe to Samsung Mobile Security bulletins for future vulnerability notifications

Evidence notes

Official Samsung security bulletin reference confirms vendor acknowledgment and fix version. CVSS 4.0 scoring from NVD indicates medium severity with local attack requirements.

Official resources

2026-03-16