RCE in Comfast Cf-Wr631ax V3
CVE-2026-15511
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.047 (91.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.047 · newest: 0.047 · change: 0.000
Affected products
- Comfast Cf-Wr631ax V3 — versions 2.7.0.0, 2.7.0.1, 2.7.0.2
Weakness classification (CWE)
References
- github.com/luminarydawn/cve/tree/main/Command Injection in Comfast CF-WR631AX V… (exploit)
- vuldb.com/cve/CVE-2026-15511 (third-party-advisory)
- vuldb.com/submit/846719 (third-party-advisory)
- vuldb.com/vuln/377840 (technical-description, vdb-entry)
- vuldb.com/vuln/377840/cti (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-15511?
- CVE-2026-15511 is a critical-severity vulnerability in Comfast Cf-Wr631ax V3, classified under Command Injection. CVSS score: 9.8/10. Published 2026-07-12.
- How severe is CVE-2026-15511?
- Critical severity. CVSS v3 base score is 9.8 out of 10.