CVE-2026-84409 Device Update Mechanism - Stored XSS & Remote Code Execution

The device contains a stored cross-site scripting vulnerability caused by unencrypted HTTP retrieval and unsafe HTML insertion of update metadata, letting attackers execute script and arbitrary code with root privileges, exploit requires attacker to control update metadata.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Remote Code Execution, Client Script Exec
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-79

Vendor fix

Use encrypted connections for update metadata retrieval and sanitize all metadata before HTML insertion; update to latest firmware version.

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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