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CVE-2021-38459: AUVESY Versiondog

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-22 · updated 2026-06-17
• Weakness: CWE-294

Description

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.

Affected products

• AUVESY Versiondog: before 8.0.0 — fixed in 8.0.0

How to fix

Upgrade to a fixed version: AUVESY Versiondog 8.0.0. Check the vendor advisory for mitigations.

References

• https://us-cert.cisa.gov/ics/advisories/icsa-21-292-01
• https://us-cert.cisa.gov/ics/advisories/icsa-21-292-01

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