CVE-2026-39453 Switch - Denial of Service

Switch web server contains a denial of service vulnerability caused by navigating to a specific URL, letting remote attackers cause the device to reboot repeatedly, exploit requires no special privileges.

CVSS base score 8.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.29% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-617

Vendor fix

Update to the latest version of the switch firmware or software.

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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