What is CVE-2023-47674?

CVE-2023-47674 is a critical-severity vulnerability in C-First Cfr-1004ea, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2023-11-16.

How severe is CVE-2023-47674?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in C-First Cfr-1004ea

CVE-2023-47674

Missing authentication for critical function vulnerability in First Corporation's DVRs allows a remote unauthenticated attacker to rewrite or obtain the configuration information of the affected device. Note that updates are provided only for Late model of CFR-4EABC, CFR-4EAB, CFR-8EAB, CFR-16EAB, MD-404AB, and MD-808AB. As for the other products, apply the workaround.

Vulnerability class: Broken Authentication

Published 2023-11-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (68.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.c-first.co.jp/information/ddososhirase/ (Vendor Advisory)
www.c-first.co.jp/wp/wp-content/uploads/2023/11/tuushin.pdf (Vendor Advisory)
jvn.jp/en/vu/JVNVU99077347/ (Third Party Advisory)

Frequently asked questions

What is CVE-2023-47674?: CVE-2023-47674 is a critical-severity vulnerability in C-First Cfr-1004ea, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2023-11-16.
How severe is CVE-2023-47674?: Critical severity. CVSS v3 base score is 9.8 out of 10.