ZDI-26-476: (Pwn2Own) Sony XAV-9500ES udev USB Rules Authorization Bypass Vulnerability
This vulnerability allows physically present attackers to bypass authorization on affected installations on Sony XAV-9500ES devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 2.4. The following CVEs are assigned: CVE-2026-18283.
AI Analysis
Technical Summary
CVE-2026-18283 is an authorization bypass vulnerability in the udev USB rules on Sony XAV-9500ES devices. It allows an attacker with physical access to connect a specially crafted USB device that causes the system to instantiate otherwise restricted USB device types without requiring authentication. This bypasses authorization controls on the device. The vulnerability was reported to Sony on 2026-03-19 and publicly disclosed on 2026-07-29. Sony has released an update to fix the issue.
Potential Impact
The vulnerability enables an attacker with physical access to bypass authorization controls on the affected device. There is no impact on confidentiality or availability, but the integrity of the system may be affected due to unauthorized device instantiation. The CVSS score of 2.4 reflects a low severity impact with no privileges required and no user interaction needed.
Mitigation Recommendations
Sony has issued an official update to correct this vulnerability. Users of Sony XAV-9500ES devices should apply the provided update from Sony's support page to remediate this issue. No additional mitigation steps are indicated by the vendor.
ZDI-26-476: (Pwn2Own) Sony XAV-9500ES udev USB Rules Authorization Bypass Vulnerability
Description
This vulnerability allows physically present attackers to bypass authorization on affected installations on Sony XAV-9500ES devices. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 2.4. The following CVEs are assigned: CVE-2026-18283.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18283 is an authorization bypass vulnerability in the udev USB rules on Sony XAV-9500ES devices. It allows an attacker with physical access to connect a specially crafted USB device that causes the system to instantiate otherwise restricted USB device types without requiring authentication. This bypasses authorization controls on the device. The vulnerability was reported to Sony on 2026-03-19 and publicly disclosed on 2026-07-29. Sony has released an update to fix the issue.
Potential Impact
The vulnerability enables an attacker with physical access to bypass authorization controls on the affected device. There is no impact on confidentiality or availability, but the integrity of the system may be affected due to unauthorized device instantiation. The CVSS score of 2.4 reflects a low severity impact with no privileges required and no user interaction needed.
Mitigation Recommendations
Sony has issued an official update to correct this vulnerability. Users of Sony XAV-9500ES devices should apply the provided update from Sony's support page to remediate this issue. No additional mitigation steps are indicated by the vendor.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-476/","fetched":true,"fetchedAt":"2026-07-30T15:56:13.324Z","wordCount":181}
Threat ID: 6a6b74c59c2644c7f84cc2c1
Added to database: 07/30/2026, 15:59:01 UTC
Last enriched: 07/30/2026, 16:06:44 UTC
Last updated: 07/31/2026, 15:23:15 UTC
Views: 13
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.