CVE-2021-38457: The server permits communication without any authentication procedure, allowing the attacker to initiate a ses

Q: How do I fix CVE-2021-38457?

versiondog: upgrade to 8.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2021-38457 being exploited?

CVE-2021-38457 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-38457 affect?

CVE-2021-38457 affects versiondog. Severity is critical (CVSS 9.8). The server permits communication without any authentication procedure, allowing the attacker to initiate a session with the server without providing any form of authentication.

Q: How urgent is CVE-2021-38457?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-38457 is a critical-severity flaw (CVSS 9.8) affecting versiondog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-284, CWE-306
Published	2021-10-22
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: auvesy

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-10-22 12:15 UTCPublished CVE record published
2026-06-17 04:02 UTCUpdated Record last modified

auvesy versiondog UPGRADE

Affected: < 8.0.0

Fixed in: 8.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy versiondog || rpm -q versiondog || versiondog --version

2. UPGRADE to 8.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade versiondog

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade versiondog

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2021-38457?

versiondog: upgrade to 8.0.0. Exact commands for each OS are on this page.

Is CVE-2021-38457 being exploited?

CVE-2021-38457 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-2021-38457 affect?

CVE-2021-38457 affects versiondog. Severity is critical (CVSS 9.8). The server permits communication without any authentication procedure, allowing the attacker to initiate a session with the server without providing any form of authentication.

How urgent is CVE-2021-38457?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-38481 HIGH 8.1 UPGRADE The scheduler service running on a specific TCP port enables the user to start and stop jobs
CVE-2021-38479 MEDIUM 6.5 UPGRADE Many API function codes receive raw pointers remotely from the user and trust these pointers as valid in-bound
CVE-2021-38477 CRITICAL 9.8 UPGRADE There are multiple API function codes that permit reading and writing data to or from files and directories, w
CVE-2021-38475 HIGH 7.3 UPGRADE The database connection to the server is performed by calling a specific API, which could allow an unprivilege
CVE-2021-38473 HIGH 8.0 UPGRADE The affected product’s code base doesn’t properly control arguments for specific functions, which could lead t

References

← Back to latest CVEs