CVE-2024-41593: DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to execute arbitrary code via the function ft
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE
CVE-2024-41593 is a critical-severity flaw (CVSS 9.8) affecting vigor3912 firmware, vigor2962 firmware, vigor3910 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to execute arbitrary code via the function ft_payload_dns(), because a byte sign-extension operation occurs for the length argument of a _memcpy call, leading to a heap-based Buffer Overflow.
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
draytek vigor3912 firmware UPGRADE
Affected: < 4.3.6.1
Fixed in: 4.3.6.1
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 vigor2962 firmware UPGRADE
Affected: < 4.3.2.8 · >= 4.4.0.0 and < 4.4.3.1
Fixed in: 4.3.2.8, 4.4.3.1
Safe to downgrade to: a release before 4.4.0.0
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 vigor3910 firmware UPGRADE
Affected: < 4.3.2.8 · >= 4.4.0.0 and < 4.4.3.1
Fixed in: 4.3.2.8, 4.4.3.1
Safe to downgrade to: a release before 4.4.0.0
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 vigor165 firmware UPGRADE
Affected: < 4.2.7
Fixed in: 4.2.7
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 vigor1000b firmware UPGRADE
Affected: < 4.3.2.8 · >= 4.4.0.0 and < 4.4.3.1
Fixed in: 4.3.2.8, 4.4.3.1
Safe to downgrade to: a release before 4.4.0.0
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 vigor166 firmware UPGRADE
Affected: < 4.2.7
Fixed in: 4.2.7
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 sourceNVD · 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-2024-41593?
vigor3912 firmware: upgrade to 4.3.6.1; vigor2962 firmware: upgrade to 4.3.2.8, 4.4.3.1; vigor3910 firmware: upgrade to 4.3.2.8, 4.4.3.1. Exact commands for each OS are on this page.
Is CVE-2024-41593 being exploited?
CVE-2024-41593 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-2024-41593 affect?
CVE-2024-41593 affects vigor3912 firmware, vigor2962 firmware, vigor3910 firmware. Severity is critical (CVSS 9.8). DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to execute arbitrary code via the function ft_payload_dns(), because a byte sign-extension operation occurs for the length argument of a _memcpy call, leading to a heap-based
How urgent is CVE-2024-41593?
Priority 54/100. Critical severity; Remotely exploitable, no login, no user action
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