CVE-2026-42026 TOTOLINK X2000R - Remote Code Execution

TOTOLINK X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 contains a stack-based buffer overflow caused by improper handling of dhcp_dns2 parameter in boa formIpv6Setup, letting authenticated attackers execute arbitrary code remotely, exploit requires authenticated HTTP request.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-121

Vendor fix

Update to the 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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