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Description

A vulnerability was determined in Comfast CF-WR631AX V3 up to 2.7.0.8. Affected by this vulnerability is the function system_wl_upload_pic_file of the file /usr/bin/webmgnt of the component FastCGI Backend. This manipulation of the argument filename causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

PUBLISHED Reserved 2026-07-12 | Published 2026-07-12 | Updated 2026-07-14 | Assigner VulDB




CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CRITICAL: 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
10.0AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

OS Command Injection

Command Injection

Product status

2.7.0.0
affected

2.7.0.1
affected

2.7.0.2
affected

2.7.0.3
affected

2.7.0.4
affected

2.7.0.5
affected

2.7.0.6
affected

2.7.0.7
affected

2.7.0.8
affected

Timeline

2026-07-12:Advisory disclosed
2026-07-12:VulDB entry created
2026-07-12:VulDB entry last update

Credits

luminarydawn (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/377840 (VDB-377840 | Comfast CF-WR631AX V3 FastCGI Backend webmgnt system_wl_upload_pic_file os command injection) vdb-entry technical-description

vuldb.com/vuln/377840/cti (VDB-377840 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-15511 (CVE-2026-15511 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/846719 (Submit #846719 | Comfast (Shenzhen Four Seas Global Link Network Technology Co., CF-WR631AX V3 V2.7.0.8 OS Command Injection) third-party-advisory

github.com/...631AX V3 — WiFi Portal Image Upload (CWE-78) exploit

cve.org (CVE-2026-15511)

nvd.nist.gov (CVE-2026-15511)

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