What is CVE-2021-38459?

CVE-2021-38459 is a high-severity vulnerability in Auvesy Versiondog, classified under Authentication Bypass by Capture-replay. CVSS score: 8.1/10. Published 2021-10-22.

How severe is CVE-2021-38459?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Auvesy Versiondog

CVE-2021-38459

The data of a network capture of the initial handshake phase can be used to authenticate at a SYSDBA level. If a specific .exe is not restarted often, it is possible to access the needed handshake packets between admin/client connections. Using the SYSDBA permission, an attacker can change user passwords or delete the database.

Published 2021-10-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Auvesy Versiondog — versions All

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

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

Frequently asked questions

What is CVE-2021-38459?: CVE-2021-38459 is a high-severity vulnerability in Auvesy Versiondog, classified under Authentication Bypass by Capture-replay. CVSS score: 8.1/10. Published 2021-10-22.
How severe is CVE-2021-38459?: High severity. CVSS v3 base score is 8.1 out of 10.