TI-2024-05695 Aliases CVE-2024-6146 GHSA-vfp8-2c95-8f3h

Stack-based buffer overflow in Actiontec WCB6200Q

MEDIUM 40CWE-121Published 2024-06-18 · Updated 2024-08-01

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Actiontec WCB6200Q uh_get_postdata_withupload Stack-based 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 stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the HTTP server. Was ZDI-CAN-21418.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01119 66th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Actiontec	WCB6200Q	1.2L.03.5	—	No fix listed	CNA

WCB6200Q VendorActiontec Affected 1.2L.03.5 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:actiontec:wcb6200q_firmware:1.2l.03.5:::::::*	1.2l.03.5	Vulnerable	Actiontec
cpe:2.3:h:actiontec:wcb6200q:-:::::::*	not specified by NVD	Running on	Actiontec

cpe:2.3:o:actiontec:wcb6200q_firmware:1.2l.03.5:*:*:*:*:*:*:* Versions 1.2l.03.5 Vulnerable ·Actiontec
cpe:2.3:h:actiontec:wcb6200q:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Actiontec

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2024-6146
2026-10-03 Alias added: GHSA-vfp8-2c95-8f3h

References

Advisory 1

ZDI-24-809

TI-2024-05694 Actiontec WCB6200Q Cookie Format String Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
TI-2024-05693 Stack-based buffer overflow in Actiontec WCB6200Q CVSS 3.1HIGH 8.8
TI-2024-05692 Buffer overflow in Actiontec WCB6200Q CVSS 3.1HIGH 8.8
TI-2024-05691 Buffer overflow in Actiontec WCB6200Q CVSS 3.1HIGH 8.8
TI-2018-07274 An issue was discovered on Actiontec WCB6200Q before 1.1.10.20a devices. CVSS 3.0HIGH 8.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences