CVE-2024-8807: Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability

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CRITICAL 9.8REMOTEUPGRADE

CVE-2024-8807 is a critical-severity flaw (CVSS 9.8) affecting vns3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cohesive Networks VNS3. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 8000 by default. The issue results from the lack of proper validation of a user-supplied string before using it

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	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-78
Published	2024-11-22
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: cohesive

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

Am I affected?

Timeline

2024-11-22 21:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

cohesive vns3 UPGRADE

Affected: < 6.2.8 · >= 6.6.0 and < 6.6.7

Fixed in: 6.2.8, 6.6.7

Safe to downgrade to: a release before 6.6.0

1. Check installed version

apt-cache policy vns3 || rpm -q vns3 || vns3 --version

2. UPGRADE to 6.2.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade vns3

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade vns3

Note

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

3. If no update is available yet, DOWNGRADE to a release before 6.6.0 (Debian / Ubuntu)

apt-cache madison vns3 sudo apt install vns3=<VERSION_BEFORE_6.6.0> sudo apt-mark hold vns3

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list vns3 sudo dnf downgrade vns3-<VERSION_BEFORE_6.6.0> sudo dnf versionlock add vns3

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-8807?

vns3: upgrade to 6.2.8, 6.6.7. Exact commands for each OS are on this page.

Is CVE-2024-8807 being exploited?

CVE-2024-8807 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-2024-8807 affect?

CVE-2024-8807 affects vns3. Severity is critical (CVSS 9.8). Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Cohesive Networks VNS3. Authentication is not required to exploi

How urgent is CVE-2024-8807?

Priority 59/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-8809 HIGH 8.8 UPGRADE Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability
CVE-2024-8808 HIGH 8.8 UPGRADE Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability
CVE-2024-8806 CRITICAL 9.8 UPGRADE Cohesive Networks VNS3 Command Injection Remote Code Execution Vulnerability

References

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