How severe is CVE-2026-24110?

CVE-2026-24110 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-24110 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-24110?

CVE-2026-24110 affects Tenda W20e Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-24110?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-24110 have an EU (EUVD) identifier?

Yes. CVE-2026-24110 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9197.

When was CVE-2026-24110 published?

CVE-2026-24110 was published on 2026-03-02 and last updated on 2026-06-17.

CVE-2026-24110

CVE-2026-24110 is a critical-severity vulnerability in Tenda W20e Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9197
Weakness: CWE-120
Affected product: Tenda W20e Firmware
Published: 2026-03-02
Last modified: 2026-06-17

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`.

Frequently asked questions

What is CVE-2026-24110?: 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`.
How severe is CVE-2026-24110?: CVE-2026-24110 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-24110 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-24110?: CVE-2026-24110 affects Tenda W20e Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-24110?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-24110 have an EU (EUVD) identifier?: Yes. CVE-2026-24110 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9197.
When was CVE-2026-24110 published?: CVE-2026-24110 was published on 2026-03-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:w20e_firmware:15.11.0.6:*:*:*:*:*:*:*

More vulnerabilities in Tenda W20e Firmware

CVE-2026-24112 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the…
CVE-2026-24115 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate the sizes of `gstup` and `gstdwn` before…
CVE-2026-24114 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Failure to validate `pPortMapIndex` may lead to buffer…
CVE-2026-24113 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by controlling the…
CVE-2026-24111 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by specifying the…
CVE-2026-24109 — Critical (CVSS 9.8): An issue was discovered in Tenda W20E V4.0br_V15.11.0.6. Attackers may exploit the vulnerability by controlling the…

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