How severe is CVE-2024-4020?

CVE-2024-4020 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-2024-4020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-4020?

CVE-2024-4020 affects Tenda Fh1206 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-4020?

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-2024-4020 have an EU (EUVD) identifier?

Yes. CVE-2024-4020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32586.

When was CVE-2024-4020 published?

CVE-2024-4020 was published on 2024-04-20 and last updated on 2026-06-17.

CVE-2024-4020

CVE-2024-4020 is a high-severity vulnerability in Tenda Fh1206 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% (73rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32586
Weakness: CWE-787
Affected product: Tenda Fh1206 Firmware
Published: 2024-04-20
Last modified: 2026-06-17

Description

A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical. This issue affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument entrys leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-261671. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Frequently asked questions

What is CVE-2024-4020?: A vulnerability was found in Tenda FH1206 1.2.0.8(8155) and classified as critical. This issue affects the function fromAddressNat of the file /goform/addressNat. The manipulation of the argument entrys leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-261671. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
How severe is CVE-2024-4020?: CVE-2024-4020 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-2024-4020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-4020?: CVE-2024-4020 affects Tenda Fh1206 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-4020?: 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-2024-4020 have an EU (EUVD) identifier?: Yes. CVE-2024-4020 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32586.
When was CVE-2024-4020 published?: CVE-2024-4020 was published on 2024-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:fh1206_firmware:1.2.0.8\(8155\):*:*:*:*:*:*:*

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