CVE-2026-12187

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.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• 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

1.94% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 78.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 2026-07-24.

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

2026-06-14 22:00Z2 MO AGO

Last updated

2026-06-15 12:54Z2 MO AGO

Reserved

2026-06-14

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')Class
• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class

Data version

5.2

Document digest

245210d5a9265fc94fb3f3f6a49a61e01bd588cf37831f8099b458c2f7cc8a0b

• vuldb.comVDB-370833 | GL.iNet GL-MT3000 Online Firmware Upgrade one_click_upgrade command injectionhttps://vuldb.com/vuln/370833vdb-entry
• vuldb.comVDB-370833 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/370833/ctisignaturepermissions-required
• vuldb.comCVE-2026-12187 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-12187third-party-advisory
• vuldb.comSubmit #815654 | GL.iNet GL-MT3000 4.4.5 Command Injectionhttps://vuldb.com/submit/815654third-party-advisory
• github.comhttps://github.com/StrTzz123/iot_vul/tree/main/GL-iNet/MT3000/4.4.5/upgrade_online_urlexploitpatch
• fw.gl-inet.comhttps://fw.gl-inet.com/firmware/mt3000/release/mt3000-4.8.1-0819-1755615825.tarpatch