CVE-2026-24110 — CRITICAL (9.8)

Vulnerability Description

An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule, " %d\t%[^\t]\t%[^\n\r\t]", &dhcpsIndex, dhcpsIP, dhcpsMac);`, the lack of size validation for the rules could lead to buffer overflows in `dhcpsIndex`, `dhcpsIP`, and `dhcpsMac`.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tenda	W20E Firmware	15.11.0.6
Tenda	W20E	4.0

Related Weaknesses (CWE)

CWE-120

References

https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2026-24110ExploitThird Party Advisory
https://www.tenda.com.cn/material/show/2707Product

FAQ

What is CVE-2026-24110?

CVE-2026-24110 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long `addDhcpRules` data. When these rules enter the `addDhcpRule` function and are processed by `ret = sscanf(pRule,...

How severe is CVE-2026-24110?

CVE-2026-24110 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-24110?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda W20E Firmware, Tenda W20E.