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CVE-2024-43027: DrayTek Vigor 3900 before v1.5.1.5_Beta, DrayTek Vigor 2960 before v1.5.1.5_Beta and DrayTek Vigor 300B before

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HIGH 8.0UPGRADEUPGRADEUPGRADE

CVE-2024-43027 is a high-severity flaw (CVSS 8.0) affecting vigor300b firmware, vigor2960 firmware, vigor3900 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

DrayTek Vigor 3900 before v1.5.1.5_Beta, DrayTek Vigor 2960 before v1.5.1.5_Beta and DrayTek Vigor 300B before v1.5.1.5_Beta were discovered to contain a command injection vulnerability via the action parameter at cgi-bin/mainfunction.cgi.

Why this priority

  • High severity
  • Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score8.0 (High)
Attack vectorAdjacent network
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance1.3% (top 30%)
CISA exploited listNo
WeaknessCWE-77
Published2024-08-21
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: draytek

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

draytek vigor300b firmware UPGRADE
Affected: < 1.5.1.5
Fixed in: 1.5.1.5
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
draytek vigor2960 firmware UPGRADE
Affected: < 1.5.1.5
Fixed in: 1.5.1.5
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
draytek vigor3900 firmware UPGRADE
Affected: < 1.5.1.5
Fixed in: 1.5.1.5
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
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-2024-43027?

vigor300b firmware: upgrade to 1.5.1.5; vigor2960 firmware: upgrade to 1.5.1.5; vigor3900 firmware: upgrade to 1.5.1.5. Exact commands for each OS are on this page.

Is CVE-2024-43027 being exploited?

CVE-2024-43027 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-2024-43027 affect?

CVE-2024-43027 affects vigor300b firmware, vigor2960 firmware, vigor3900 firmware. Severity is high (CVSS 8.0). DrayTek Vigor 3900 before v1.5.1.5_Beta, DrayTek Vigor 2960 before v1.5.1.5_Beta and DrayTek Vigor 300B before v1.5.1.5_Beta were discovered to contain a command injection vulnerability via the action parameter at cgi-bin/mainfunction.cgi.

How urgent is CVE-2024-43027?

Priority 51/100. High severity; Public exploit reference

Related CVEs

References

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