How severe is CVE-2024-4243?

CVE-2024-4243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-4243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-4243?

CVE-2024-4243 affects Tenda W9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-4243?

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

Does CVE-2024-4243 have an EU (EUVD) identifier?

Yes. CVE-2024-4243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32795.

When was CVE-2024-4243 published?

CVE-2024-4243 was published on 2024-04-26 and last updated on 2026-06-17.

CVE-2024-4243

CVE-2024-4243 is a high-severity vulnerability in Tenda W9 Firmware with a CVSS 3.x base score of 8.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32795
Weakness: CWE-787
Affected product: Tenda W9 Firmware
Published: 2024-04-26
Last modified: 2026-06-17

Description

A vulnerability classified as critical has been found in Tenda W9 1.0.0.7(4456). Affected is the function formwrlSSIDset of the file /goform/wifiSSIDset. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-262134 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2024-4243?: A vulnerability classified as critical has been found in Tenda W9 1.0.0.7(4456). Affected is the function formwrlSSIDset of the file /goform/wifiSSIDset. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. VDB-262134 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2024-4243?: CVE-2024-4243 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-4243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-4243?: CVE-2024-4243 affects Tenda W9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-4243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-4243 have an EU (EUVD) identifier?: Yes. CVE-2024-4243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32795.
When was CVE-2024-4243 published?: CVE-2024-4243 was published on 2024-04-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:w9_firmware:1.0.0.7\(4456\):*:*:*:*:*:*:*

More vulnerabilities in Tenda W9 Firmware

CVE-2023-51102 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a stack overflow via the function formWifiMacFilterSet.
CVE-2023-51101 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a stack overflow via the function formSetUplinkInfo.
CVE-2023-51100 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a command injection vulnerability via the function…
CVE-2023-51099 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a command injection vulnerability via the function formexeCommand .
CVE-2023-51098 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a command injection vulnerability via the function…
CVE-2023-51097 — Critical (CVSS 9.8): Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a stack overflow via the function formSetAutoPing.

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