Samsung Galaxy S25 TIFF File Processing Heap-based Buffer Overflow Remote Code Execution Vulnerability

August 11th, 2026
ZDI-26-529 ZDI-CAN-29432

CVE ID

CVE-2026-21045

CVSS Score

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

Affected Vendors

Samsung

Affected Products

Galaxy S25

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Samsung Galaxy S25 devices. User interaction may be required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the processing of TIFF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Samsung has issued an update to correct this vulnerability. More details can be found at:
https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=07

Disclosure Timeline

  • 2026-05-06 - Vulnerability reported to vendor
  • 2026-08-11 - Coordinated public release of advisory
  • 2026-08-11 - Advisory Updated

Credit

Dvir Gozlan

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