How severe is CVE-2024-3909?

CVE-2024-3909 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-2024-3909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-3909?

CVE-2024-3909 affects Tenda Ac500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-3909?

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-2024-3909 have an EU (EUVD) identifier?

Yes. CVE-2024-3909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32477.

When was CVE-2024-3909 published?

CVE-2024-3909 was published on 2024-04-17 and last updated on 2026-06-17.

CVE-2024-3909

CVE-2024-3909 is a high-severity vulnerability in Tenda Ac500 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: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32477
Weakness: CWE-787
Affected product: Tenda Ac500 Firmware
Published: 2024-04-17
Last modified: 2026-06-17

Description

A vulnerability classified as critical was found in Tenda AC500 2.0.1.9(1307). Affected by this vulnerability is the function formexeCommand of the file /goform/execCommand. The manipulation of the argument cmdinput leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-261145 was 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-2024-3909?: A vulnerability classified as critical was found in Tenda AC500 2.0.1.9(1307). Affected by this vulnerability is the function formexeCommand of the file /goform/execCommand. The manipulation of the argument cmdinput leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-261145 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2024-3909?: CVE-2024-3909 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-2024-3909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-3909?: CVE-2024-3909 affects Tenda Ac500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-3909?: 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-2024-3909 have an EU (EUVD) identifier?: Yes. CVE-2024-3909 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32477.
When was CVE-2024-3909 published?: CVE-2024-3909 was published on 2024-04-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac500_firmware:2.0.1.9\(1307\):*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac500 Firmware

CVE-2024-32318 — Critical (CVSS 9.8): Tenda AC500 V2.0.1.9(1307) firmware has a stack overflow vulnerability via the vlan parameter in the formSetVlanInfo…
CVE-2023-25234 — Critical (CVSS 9.8): Tenda AC500 V2.0.1.9(1307) is vulnerable to Buffer Overflow in function fromAddressNat via parameters entrys and…
CVE-2023-25233 — Critical (CVSS 9.8): Tenda AC500 V2.0.1.9(1307) is vulnerable to Buffer Overflow in function fromRouteStatic via parameters entrys and…
CVE-2025-7586 — High (CVSS 8.8): A vulnerability was found in Tenda AC500 2.0.1.9(1307). It has been declared as critical. Affected by this…
CVE-2024-3910 — High (CVSS 8.8): A vulnerability, which was classified as critical, has been found in Tenda AC500 2.0.1.9(1307). Affected by this issue…
CVE-2024-3907 — High (CVSS 8.8): A vulnerability was found in Tenda AC500 2.0.1.9(1307). It has been rated as critical. This issue affects the function…

All CVEs affecting Tenda Ac500 Firmware →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →