CVE-2026-24110
An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long ...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-24110- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-120
- Updated
- 2026-11-02
EUVDEUVD-2026-9197
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.
- Record
EUVD-2026-9197- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jhhp-rvwq-h7p2
An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may send overly long ...
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.
- Record
GHSA-jhhp-rvwq-h7p2- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-120
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-24110- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-120
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-24110 is a critical vulnerability (CVSS 9.8) in Tenda W20e Firmware, published March 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.48%, the 42nd percentile. No source names a fixed version.