CVE-2026-77004

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 ImpactpartialSuccessful exploitation gives limited 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

1.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 67.9% of scored records. A rank, not a probability.

NVD base score

2.1 (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:L/VI:L/VA:L/SC:L/SI:L/SA:L/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 2026-08-24.

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

2026-08-20 16:00Z15 DAYS AGO

Last updated

2026-08-20 17:10Z15 DAYS AGO

Reserved

2026-08-20

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

2012a73782ee92828d0e7ab7dbb0a54b67bc54644aa4695f00ac50225045e485

• vuldb.comVDB-393623 | Comfast CF-N1-S mbox-config sprintf command injectionhttps://vuldb.com/vuln/393623vdb-entrytechnical-description
• vuldb.comVDB-393623 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/393623/ctisignaturepermissions-required
• vuldb.comCVE-2026-77004 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-77004third-party-advisory
• vuldb.comSubmit #880584 | Comfast CF-N1-S V2 V2.6.0.1 Command Injectionhttps://vuldb.com/submit/880584third-party-advisory
• github.comhttps://github.com/lxiansheng488-bit/-/blob/main/%E5%8E%82%E5%95%86comefast%20%20CF-N1-S%20V2.pdfexploit