PatchTheCVECVE-2021-38459: The data of a network capture of the initial handshake phase can be used to authenticate at a SYSDBA level
CVE-2021-38459 is a high-severity flaw (CVSS 8.1) affecting versiondog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.1 (High) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 37%) |
| CISA exploited list | No |
| Weakness | CWE-294 |
| Published | 2021-10-22 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-38459?
versiondog: upgrade to 8.0.0. Exact commands for each OS are on this page.
Is CVE-2021-38459 being exploited?
CVE-2021-38459 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-38459 affect?
CVE-2021-38459 affects versiondog. Severity is high (CVSS 8.1). 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. U
How urgent is CVE-2021-38459?
Priority 49/100. High severity; Remotely exploitable, no login, no user action
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