What is CVE-2021-38457?

CVE-2021-38457 is a critical-severity vulnerability in Auvesy Versiondog, classified under Improper Access Control. CVSS score: 9.8/10. Published 2021-10-22.

How severe is CVE-2021-38457?

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

Auth bypass in Auvesy Versiondog

CVE-2021-38457

The server permits communication without any authentication procedure, allowing the attacker to initiate a session with the server without providing any form of authentication.

Published 2021-10-22 · 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 (70.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.0% 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

Auvesy Versiondog — versions All

Weakness classification (CWE)

References

us-cert.cisa.gov/ics/advisories/icsa-21-292-01 (US Government Resource, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38457?: CVE-2021-38457 is a critical-severity vulnerability in Auvesy Versiondog, classified under Improper Access Control. CVSS score: 9.8/10. Published 2021-10-22.
How severe is CVE-2021-38457?: Critical severity. CVSS v3 base score is 9.8 out of 10.