CVE-2026-4861A weakness has been identified in Wavlink WL-NU516U1 260227.
Updated under an hour ago ()
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It affects wavlink wl-nu516u1_firmware. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-119, CWE-121
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
wavlink wl-nu516u1_firmware wavlink:wl-nu516u1_firmware | m16u1_v260227 | NVD |
References
- https://github.com/Wlz1112/WAVLINK-NU516U1-V260227/blob/main/Content-Length.mdexploit, third-party-advisory
- https://vuldb.com/?ctiid.353192permissions-required, vdb-entry
- https://vuldb.com/?id.353192third-party-advisory, vdb-entry
- https://vuldb.com/?submit.776217third-party-advisory, vdb-entry
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.