CVE-2024-39768: Wavlink AC3000 · Classic Buffer Overflow
Affects Wavlink AC3000Source CVE Database V5
Not known to be exploited · CVSS 9.1 Critical.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 1.2% chance of exploitation in 30 days – higher than 70% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
AI-suggested
1. Restrict administrative access to the Wavlink AC3000 router interfaces by limiting management to trusted internal networks or VPNs. 2. Enforce strong, unique passwords and disable default or unused accounts to reduce the risk of credential compromise. 3. Monitor router logs and network traffic for unusual HTTP POST requests targeting the internet.cgi endpoint or abnormal QoS configuration changes. 4. Implement network segmentation to isolate vulnerable devices from sensitive internal resources. 5. Apply firmware updates from Wavlink as soon as they become available to address this vulnerability. 6. If immediate patching is not possible, consider deploying web application firewalls or intrusion prevention systems capable of detecting and blocking malformed HTTP requests targeting the vulnerable parameter. 7. Conduct regular vulnerability assessments and penetration tests focusing on network edge devices to identify and remediate similar risks. 8. Educate network administrators on the risks of buffer overflow vulnerabilities and the importance of timely patch management.
Description
Multiple buffer overflow vulnerabilities exist in the internet.cgi set_qos() functionality of Wavlink AC3000 M33A8.V5030.210505. A specially crafted HTTP request can lead to stack-based buffer overflow. An attacker can make an authenticated HTTP request to trigger these vulnerabilities.This vulnerability exists in the `cli_name` POST parameter.