CVE-2026-15511

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

4.73% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.2% of scored records. A rank, not a probability.

NVD base score

8.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-07-14.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-07-12 23:00Z1 MO AGO

Last updated

2026-07-14 14:48Z1 MO AGO

Reserved

2026-07-12

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

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

Weaknesses

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.2

Document digest

473a73e4b04a64397b3fdad8c841d17a180e7872330840d6c132ec7dde2ee77e

• vuldb.comVDB-377840 | Comfast CF-WR631AX V3 FastCGI Backend webmgnt system_wl_upload_pic_file os command injectionhttps://vuldb.com/vuln/377840vdb-entrytechnical-description
• vuldb.comVDB-377840 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/377840/ctisignaturepermissions-required
• vuldb.comCVE-2026-15511 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-15511third-party-advisory
• vuldb.comSubmit #846719 | Comfast (Shenzhen Four Seas Global Link Network Technology Co., CF-WR631AX V3 V2.7.0.8 OS Command Injectionhttps://vuldb.com/submit/846719third-party-advisory
• github.comhttps://github.com/luminarydawn/cve/tree/main/Command%20Injection%20in%20Comfast%20CF-WR631AX%20V3%20%E2%80%94%20WiFi%20Portal%20Image%20Upload%20(CWE-78)exploit