CVE-2026-91191 Device Update Mechanism - Authentication Bypass

A device's update mechanism contains a broken authentication caused by disabled signature verification and exposed production private key in the SDK, letting attackers supply malicious packages that execute arbitrary code with root privileges during installation, exploit requires ability to supply packages.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Remote Code Execution, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
29 September 2026
Updated
15 October 2026
Weakness
CWE-347

Vendor fix

Update to the latest firmware version that enforces signature verification and removes exposed private keys.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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