CVE-2026-9817 TOTOLINK X2000R - Buffer Overflow

TOTOLINK X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 contains a stack-based buffer overflow caused by improper handling in formUploadFile functionality, letting authenticated attackers execute arbitrary code remotely, exploit requires authentication.

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

Details

Type
Buffer Overflow
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 version or apply vendor patches addressing this vulnerability.

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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