CVE-2024-41338: DrayTek VIGOR165 Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A NULL pointer dereference in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to v3.9.7, Vigor 2862/2926 prior to v3.9.9.4, Vigor 2133/2762/2832 prior to v3.9.8, Vigor 2135/2765/2766 prior to v4.4.5.1, Vigor 2865/2866/2927 prior to v4.4.5.3, Vigor 2962/3910 prior to v4.3.2.7, Vigor 3912 prior to v4.3.5.2, and Vigor 2925 up to v3.9.6 allows attackers to cause a Denial of Service (DoS) via a crafted DHCP request.

Affected products

• DrayTek VIGOR165 Firmware: before 4.2.6 (fixed in 4.2.6)
• DrayTek VIGOR166 Firmware: before 4.2.6 (fixed in 4.2.6)
• DrayTek VIGOR2133 Firmware: before 3.9.8 (fixed in 3.9.8)
• DrayTek VIGOR2135 Firmware: before 4.4.5.1 (fixed in 4.4.5.1)
• DrayTek VIGOR2620 Firmware: before 3.9.8.8 (fixed in 3.9.8.8)
• DrayTek VIGOR2762 Firmware: before 3.9.8 (fixed in 3.9.8)
• DrayTek VIGOR2765 Firmware: before 4.4.5.1 (fixed in 4.4.5.1)
• DrayTek VIGOR2766 Firmware: before 4.4.5.1 (fixed in 4.4.5.1)
• DrayTek VIGOR2832 Firmware: before 3.9.8 (fixed in 3.9.8)
• DrayTek VIGOR2860 Firmware: before 3.9.7 (fixed in 3.9.7)
• DrayTek VIGOR2862 Firmware: before 3.9.9.4 (fixed in 3.9.9.4)
• DrayTek VIGOR2865 Firmware: before 4.4.5.3 (fixed in 4.4.5.3)
• DrayTek VIGOR2866 Firmware: before 4.4.5.3 (fixed in 4.4.5.3)
• DrayTek VIGOR2925 Firmware: before 3.9.7 (fixed in 3.9.7)
• DrayTek VIGOR2926 Firmware: before 3.9.9.4 (fixed in 3.9.9.4)
• DrayTek VIGOR2927 Firmware: before 4.4.5.3 (fixed in 4.4.5.3)
• DrayTek VIGOR2962 Firmware: before 4.3.2.7 (fixed in 4.3.2.7)
• DrayTek VIGOR3910 Firmware: before 4.3.2.7 (fixed in 4.3.2.7)
• DrayTek VIGOR3912 Firmware: before 4.3.5.2 (fixed in 4.3.5.2)
• DrayTek VIGORLTE200 Firmware: before 3.9.8.8 (fixed in 3.9.8.8)

Published 2025-02-27. Last modified 2026-07-05.