How severe is CVE-2024-6142?

CVE-2024-6142 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-6142 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-6142?

CVE-2024-6142 affects Actiontec Wcb6200q Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-6142?

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-2024-6142 have an EU (EUVD) identifier?

Yes. CVE-2024-6142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-47286.

When was CVE-2024-6142 published?

CVE-2024-6142 was published on 2024-06-19 and last updated on 2026-06-17.

CVE-2024-6142

CVE-2024-6142 is a high-severity vulnerability in Actiontec Wcb6200q 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-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-47286
Weakness: CWE-120
Affected product: Actiontec Wcb6200q Firmware
Published: 2024-06-19
Last modified: 2026-06-17

Description

Actiontec WCB6200Q uh_tcp_recv_content Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Actiontec WCB6200Q routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HTTP server. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the HTTP server. Was ZDI-CAN-21410.

Frequently asked questions

What is CVE-2024-6142?: Actiontec WCB6200Q uh_tcp_recv_content Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Actiontec WCB6200Q routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HTTP server. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the HTTP server. Was ZDI-CAN-21410.
How severe is CVE-2024-6142?: CVE-2024-6142 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-6142 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-6142?: CVE-2024-6142 affects Actiontec Wcb6200q Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-6142?: 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-2024-6142 have an EU (EUVD) identifier?: Yes. CVE-2024-6142 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-47286.
When was CVE-2024-6142 published?: CVE-2024-6142 was published on 2024-06-19 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-24-805/

Affected products (1)

cpe:2.3:o:actiontec:wcb6200q_firmware:1.2l.03.5:*:*:*:*:*:*:*

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