CVE-2024-39769: 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, 11:07 UTC
- EPSS
- 0.9% chance of exploitation in 30 days – higher than 59% 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 26 Oct 2026.
What to do
AI-suggested
- Immediately inventory all Wavlink AC3000 devices running the affected firmware version M33A8.V5030.210505 within the network.
- Restrict administrative access to these devices to trusted management networks and use strong authentication mechanisms to reduce the risk of credential compromise.
- Disable remote HTTP management interfaces or restrict them via firewall rules to prevent unauthorized access.
- Monitor network traffic and device logs for unusual or unauthorized HTTP POST requests targeting internet.cgi endpoints.
- Implement network segmentation to isolate vulnerable devices from critical assets.
- Engage with Wavlink support or vendor channels to obtain firmware updates or patches as soon as they become available.
- Consider deploying intrusion detection/prevention systems (IDS/IPS) with signatures targeting exploitation attempts of this vulnerability.
- Educate network administrators about the risk and ensure strict password policies and multi-factor authentication are enforced.
- If patching is delayed, consider temporary device replacement or alternative hardware for critical network segments.
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_mac` POST parameter.