CVE-2021-38471: There are multiple API function codes that permit data writing to any file, which may allow an attacker to mod

Q: How do I fix CVE-2021-38471?

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

Q: Is CVE-2021-38471 being exploited?

CVE-2021-38471 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-2021-38471 affect?

CVE-2021-38471 affects versiondog. Severity is critical (CVSS 9.1). There are multiple API function codes that permit data writing to any file, which may allow an attacker to modify existing files or create new files.

Q: How urgent is CVE-2021-38471?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2021-38471 is a critical-severity flaw (CVSS 9.1) affecting versiondog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

There are multiple API function codes that permit data writing to any file, which may allow an attacker to modify existing files or create new files.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-434
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-2021-38471?

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

Is CVE-2021-38471 being exploited?

CVE-2021-38471 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-2021-38471 affect?

CVE-2021-38471 affects versiondog. Severity is critical (CVSS 9.1). There are multiple API function codes that permit data writing to any file, which may allow an attacker to modify existing files or create new files.

How urgent is CVE-2021-38471?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

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References

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