CVE-2024-41334: n/a in n/a
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 were discovered to not utilize certificate verification, allowing attackers to upload crafted APPE modules from non-official servers, leading to arbitrary code execution.
AI Analysis
Technical Summary
CVE-2024-41334 is a high-severity vulnerability affecting multiple models of Draytek Vigor network devices, including routers and LTE gateways. The affected models span a wide range of firmware versions prior to specific updates (e.g., Vigor 165/166 prior to v4.2.6, Vigor 2620/LTE200 prior to v3.9.8.8, and others as listed). The core issue stems from the devices not performing proper certificate verification when downloading and installing APPE (Application Extension) modules. This lack of validation allows an attacker to upload maliciously crafted APPE modules from non-official servers. Exploiting this flaw can lead to arbitrary code execution on the device, compromising its confidentiality, integrity, and availability. The vulnerability is classified under CWE-295, which relates to improper certificate validation. The CVSS v3.1 score is 8.8, indicating a high impact with network attack vector, low attack complexity, requiring low privileges but no user interaction, and affecting confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the vulnerability presents a significant risk due to the critical role these devices play in network infrastructure and the ease of exploitation once an attacker gains network access. The absence of certificate verification means attackers can impersonate legitimate update servers, pushing malicious code that could enable persistent backdoors, data interception, or disruption of network services.
Potential Impact
For European organizations, this vulnerability poses a serious threat to network security and operational continuity. Draytek devices are widely used in small to medium enterprises, branch offices, and some critical infrastructure sectors across Europe. Successful exploitation could lead to full compromise of network gateways, allowing attackers to intercept sensitive communications, manipulate traffic, or launch further attacks within internal networks. This could result in data breaches involving personal data protected under GDPR, leading to regulatory penalties and reputational damage. Additionally, disruption of network availability could impact business operations, especially for organizations relying on these devices for VPN connectivity or remote access. The high severity and ease of exploitation increase the likelihood that threat actors, including cybercriminals or state-sponsored groups, might target European entities using these devices. The lack of user interaction and low privilege requirements mean that even limited access to the network could be sufficient for exploitation, raising concerns for organizations with less mature network segmentation or monitoring.
Mitigation Recommendations
Organizations should immediately inventory their network infrastructure to identify any Draytek Vigor devices running vulnerable firmware versions. The primary mitigation is to upgrade all affected devices to the latest firmware versions provided by Draytek that include proper certificate verification for APPE module updates. If immediate patching is not possible, organizations should restrict network access to management interfaces of these devices, ideally limiting them to trusted administrative networks or VPNs. Implement network segmentation to isolate vulnerable devices from critical systems and monitor network traffic for unusual connections to unauthorized update servers. Employ strict firewall rules to block outbound connections from these devices to untrusted IP addresses or domains. Additionally, enable logging and alerting on device management activities to detect potential exploitation attempts. Organizations should also review and harden device configurations, disable unused services, and consider deploying intrusion detection/prevention systems capable of identifying anomalous firmware update behaviors. Finally, maintain awareness of any emerging exploit reports or patches from Draytek and apply updates promptly.
Affected Countries
Germany, United Kingdom, France, Italy, Spain, Netherlands, Poland, Belgium, Sweden, Austria
CVE-2024-41334: n/a in n/a
Description
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 were discovered to not utilize certificate verification, allowing attackers to upload crafted APPE modules from non-official servers, leading to arbitrary code execution.
AI-Powered Analysis
Technical Analysis
CVE-2024-41334 is a high-severity vulnerability affecting multiple models of Draytek Vigor network devices, including routers and LTE gateways. The affected models span a wide range of firmware versions prior to specific updates (e.g., Vigor 165/166 prior to v4.2.6, Vigor 2620/LTE200 prior to v3.9.8.8, and others as listed). The core issue stems from the devices not performing proper certificate verification when downloading and installing APPE (Application Extension) modules. This lack of validation allows an attacker to upload maliciously crafted APPE modules from non-official servers. Exploiting this flaw can lead to arbitrary code execution on the device, compromising its confidentiality, integrity, and availability. The vulnerability is classified under CWE-295, which relates to improper certificate validation. The CVSS v3.1 score is 8.8, indicating a high impact with network attack vector, low attack complexity, requiring low privileges but no user interaction, and affecting confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the vulnerability presents a significant risk due to the critical role these devices play in network infrastructure and the ease of exploitation once an attacker gains network access. The absence of certificate verification means attackers can impersonate legitimate update servers, pushing malicious code that could enable persistent backdoors, data interception, or disruption of network services.
Potential Impact
For European organizations, this vulnerability poses a serious threat to network security and operational continuity. Draytek devices are widely used in small to medium enterprises, branch offices, and some critical infrastructure sectors across Europe. Successful exploitation could lead to full compromise of network gateways, allowing attackers to intercept sensitive communications, manipulate traffic, or launch further attacks within internal networks. This could result in data breaches involving personal data protected under GDPR, leading to regulatory penalties and reputational damage. Additionally, disruption of network availability could impact business operations, especially for organizations relying on these devices for VPN connectivity or remote access. The high severity and ease of exploitation increase the likelihood that threat actors, including cybercriminals or state-sponsored groups, might target European entities using these devices. The lack of user interaction and low privilege requirements mean that even limited access to the network could be sufficient for exploitation, raising concerns for organizations with less mature network segmentation or monitoring.
Mitigation Recommendations
Organizations should immediately inventory their network infrastructure to identify any Draytek Vigor devices running vulnerable firmware versions. The primary mitigation is to upgrade all affected devices to the latest firmware versions provided by Draytek that include proper certificate verification for APPE module updates. If immediate patching is not possible, organizations should restrict network access to management interfaces of these devices, ideally limiting them to trusted administrative networks or VPNs. Implement network segmentation to isolate vulnerable devices from critical systems and monitor network traffic for unusual connections to unauthorized update servers. Employ strict firewall rules to block outbound connections from these devices to untrusted IP addresses or domains. Additionally, enable logging and alerting on device management activities to detect potential exploitation attempts. Organizations should also review and harden device configurations, disable unused services, and consider deploying intrusion detection/prevention systems capable of identifying anomalous firmware update behaviors. Finally, maintain awareness of any emerging exploit reports or patches from Draytek and apply updates promptly.
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Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mitre
- Date Reserved
- 2024-07-18T00:00:00.000Z
- Cisa Enriched
- true
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 682d981cc4522896dcbda2ca
Added to database: 5/21/2025, 9:08:44 AM
Last enriched: 7/3/2025, 8:11:04 AM
Last updated: 8/15/2025, 12:51:25 AM
Views: 13
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