Quick answers
- Is CVE-2026-52191 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-52191 being exploited in the wild.
- How severe is CVE-2026-52191?
- Informational severity, with a CVSS score of 9.8, published 2 July 2026.
- Which products and versions are affected?
- UTT NV518G nv518GV3v3.2.7-210919-161313.
- Is there a fix for CVE-2026-52191?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-52191 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-52191?
- Check whether you run UTT NV518G at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A stack-based buffer overflow exists in the UTT nv518G router (firmware version nv518GV3v3.2.7-210919-161313) within the GoAhead web server component. The vulnerability is located in function sub_444C8C, where the 'port' parameter from an HTTP POST request is retrieved via websGetVar(). This user-controlled string is then appended to a fixed-size 104-byte stack buffer using strcat() without any length validation. An attacker providing a 'port' value exceeding approximately 72 bytes can overwrite the saved return address on the stack, leading to a denial of service (DoS) or remote code execution (RCE). No authentication is required to exploit this vulnerability over the network.
Affected products
- UTT nv518G nv518GV3v3.2.7-210919-161313
Timeline
- 2026-07-02: disclosed: Initial disclosure via NVD and GitHub report