CVE-2026-8137 Details
Description
A vulnerability has been found in Totolink X5000R 9.1.0u.6369_B20230113. This vulnerability affects the function sub_458E40 of the file /boafrm/formDdns. The manipulation of the argument submit-url leads to buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
A buffer overflow vulnerability has been identified in the Totolink X5000R router, specifically in the firmware version 9.1.0u.6369_B20230113. The issue arises in the '/boafrm/formDdns' endpoint, within the 'sub_458E40' function, where the 'submit-url' parameter is processed without proper input validation. This oversight allows remote attackers to send oversized 'submit-url' values, leading to stack memory overwriting. Such exploitation can cause application crashes, memory corruption, and potentially allow arbitrary code execution on the server.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 8, 2026CISA-ADP
Assessed May 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Kiciot/cve/issues/4 | [email protected] | ExploitIssue TrackingTechnical Description |
| https://vuldb.com/submit/808863 | [email protected] | Permission Required |
| https://vuldb.com/vuln/361926 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/361926/cti | [email protected] | AdvisoryPermission Required |
| https://www.totolink.net/ | [email protected] | Vendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Totolink X5000R | 9.1.0u.6369_B20230113 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 8, 2026 | New CVE Received | [email protected] |