What’s Vulnerable › Vulnerabilities

CVE-2024-41593

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-10-03 · updated 2026-06-17
• Weakness: CWE-787

Description

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.

Affected products

• DrayTek Vigor1000B Firmware: before 4.3.2.8; from 4.4.0.0 before 4.4.3.1 — fixed in 4.3.2.8, 4.4.3.1
• DrayTek Vigor165 Firmware: before 4.2.7 — fixed in 4.2.7
• DrayTek Vigor166 Firmware: before 4.2.7 — fixed in 4.2.7
• DrayTek Vigor2133 Firmware: all versions
• DrayTek Vigor2135 Firmware: before 4.4.5.3 — fixed in 4.4.5.3
• DrayTek Vigor2620 Firmware: all versions
• DrayTek Vigor2762 Firmware: all versions
• DrayTek Vigor2763 Firmware: before 4.4.5.3 — fixed in 4.4.5.3
• DrayTek Vigor2765 Firmware: before 4.4.5.3 — fixed in 4.4.5.3
• DrayTek Vigor2766 Firmware: before 4.4.5.3 — fixed in 4.4.5.3
• DrayTek Vigor2832 Firmware: all versions
• DrayTek Vigor2860 Firmware: all versions
• DrayTek Vigor2862 Firmware: all versions
• DrayTek Vigor2865 Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• DrayTek Vigor2866 Firmware: before 4.4.5.2 — fixed in 4.4.5.2
• DrayTek Vigor2915 Firmware: before 4.4.5.3 — fixed in 4.4.5.3
• DrayTek Vigor2925 Firmware: all versions
• DrayTek Vigor2926 Firmware: all versions
• DrayTek Vigor2952 Firmware: all versions
• DrayTek Vigor2962 Firmware: before 4.3.2.8; from 4.4.0.0 before 4.4.3.1 — fixed in 4.3.2.8, 4.4.3.1
• DrayTek Vigor3220 Firmware: all versions
• DrayTek Vigor3910 Firmware: before 4.3.2.8; from 4.4.0.0 before 4.4.3.1 — fixed in 4.3.2.8, 4.4.3.1
• DrayTek Vigor3912 Firmware: before 4.3.6.1 — fixed in 4.3.6.1
• DrayTek Vigorlte200 Firmware: all versions

How to fix

Upgrade to a fixed version: DrayTek Vigor1000B Firmware 4.3.2.8, 4.4.3.1; DrayTek Vigor165 Firmware 4.2.7; DrayTek Vigor166 Firmware 4.2.7; DrayTek Vigor2135 Firmware 4.4.5.3; DrayTek Vigor2763 Firmware 4.4.5.3; DrayTek Vigor2765 Firmware 4.4.5.3; DrayTek Vigor2766 Firmware 4.4.5.3; DrayTek Vigor2865 Firmware 4.4.5.2; DrayTek Vigor2866 Firmware 4.4.5.2; DrayTek Vigor2915 Firmware 4.4.5.3; DrayTek Vigor2962 Firmware 4.3.2.8, 4.4.3.1; DrayTek Vigor3910 Firmware 4.3.2.8, 4.4.3.1. Check the vendor advisory for mitigations.

References

• https://www.forescout.com/resources/draybreak-draytek-research/
• https://www.forescout.com/resources/draytek14-vulnerabilities

Get alerted when CVE-2024-41593 or the next vulnerability affects your stack