CVE-2026-85109 Details
Description
A vulnerability was determined in Tenda HG10 300001138. This issue affects the function formLogin of the file /boaform/formLogin of the component Boa Web Server. Executing a manipulation of the argument Username can lead to buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
A buffer overflow vulnerability has been identified in the Tenda HG10 router, specifically in the Boa web server's formLogin function. This issue arises from improper handling of the username parameter, allowing remote attackers to manipulate the input and overwrite adjacent memory. The vulnerability, present in firmware version 300001138, has been publicly disclosed and could lead to a denial-of-service condition or potentially allow arbitrary code execution, depending on the memory layout and runtime protections.
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 Sep 3, 2026CISA-ADP
Assessed Sep 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/Tenda/HG10/bof-formLogin_username.md | [email protected] | ExploitTechnical Analysis |
| https://vuldb.com/cve/CVE-2026-85109 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/891994 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/398315 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/398315/cti | [email protected] | Content Wall |
| https://www.tenda.com.cn/ | [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 |
|---|---|
| Tenda HG10 | HG7_HG9_HG10re_300001138 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | CVE Modified | CISA-ADP |
| Sep 3, 2026 | New CVE Received | [email protected] |