(Pwn2Own) Sony XAV-9500ES RTSP SETUP Buffer Overflow Remote Code Execution Vulnerability

July 29th, 2026
ZDI-26-472 ZDI-CAN-29042

CVE ID

CVE-2026-18279

CVSS Score

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

Affected Vendors

Sony

Affected Products

XAV-9500ES

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sony XAV-9500ES devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of SETUP RTSP packets. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

Additional Details

Sony has issued an update to correct this vulnerability. More details can be found at:
https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-9500es/software/00274922

Disclosure Timeline

  • 2026-03-19 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

Neodyme AG

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