What is CVE-2023-43271?

CVE-2023-43271 is a critical-severity vulnerability in 70mai A500s, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2023-10-09.

How severe is CVE-2023-43271?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in 70mai A500s

CVE-2023-43271

Incorrect access control in 70mai a500s v1.2.119 allows attackers to directly access and delete the video files of the driving recorder through ftp and other protocols.

Vulnerability class: Broken Authentication

Published 2023-10-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.1th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

70mai A500s
70mai A500s Firmware — versions 1.2.119

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

github.com/Question-h/vuln/blob/master/70mai_a500s_backdoor.md (Exploit, Third Party Advisory)
github.com/Question-h/vuln/blob/master/CVE-2023-43271.md (Third Party Advisory)

Frequently asked questions

What is CVE-2023-43271?: CVE-2023-43271 is a critical-severity vulnerability in 70mai A500s, classified under Missing Authentication for Critical Function. CVSS score: 9.1/10. Published 2023-10-09.
How severe is CVE-2023-43271?: Critical severity. CVSS v3 base score is 9.1 out of 10.