Vulnerability Description
A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wavlink | Wl-Nu516U1 Firmware | m16u1_v260227 |
| Wavlink | Wl-Nu516U1 | - |
Related Weaknesses (CWE)
References
- https://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.mdExploitThird Party Advisory
- https://vuldb.com/?ctiid.353192Permissions RequiredVDB Entry
- https://vuldb.com/?id.353192Third Party AdvisoryVDB Entry
- https://vuldb.com/?submit.776217Third Party AdvisoryVDB Entry
FAQ
What is CVE-2026-4861?
CVE-2026-4861 is a vulnerability with a CVSS score of 8.8 (HIGH). A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-b...
How severe is CVE-2026-4861?
CVE-2026-4861 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4861?
Check the references section above for vendor advisories and patch information. Affected products include: Wavlink Wl-Nu516U1 Firmware, Wavlink Wl-Nu516U1.