Comfast CF-WR631AX V3 FastCGI Backend webmgnt system_wl_upload_pic_file os command injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-15511
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-12 23:16:38 UTC
Updated2026-07-14 15:16:58 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 8.9 HIGH from [email protected]

CVSS: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/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

EPSS: 0.026900000 probability, percentile 0.841340000 (date 2026-07-14)

Problem Types: CWE-77 | CWE-78 | CWE-78 OS Command Injection | CWE-77 Command Injection

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.9HIGHCVSS: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/C...
4.0CNADECLARED9.3CRITICALCVSS: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
3.1[email protected]Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
3.0CNADECLARED9.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
2.0[email protected]Secondary10AV:N/AC:L/Au:N/C:C/I:C/A:C
2.0CNADECLARED10AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS: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/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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Comfast CF-WR631AX V3 affected 2.7.0.0 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.1 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.2 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.3 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.4 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.5 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.6 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.7 Not specified
CNA Comfast CF-WR631AX V3 affected 2.7.0.8 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/377840 [email protected] vuldb.com
github.com/luminarydawn/cve/tree/main/Command%20Injection%20in%20Comfast... [email protected] github.com
vuldb.com/cve/CVE-2026-15511 [email protected] vuldb.com
vuldb.com/submit/846719 [email protected] vuldb.com
vuldb.com/vuln/377840/cti [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: luminarydawn (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-07-12T00:00:00.000ZAdvisory disclosed
CNA2026-07-12T02:00:00.000ZVulDB entry created
CNA2026-07-12T08:05:16.000ZVulDB entry last update

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