CVE-2026-3703Wavlink NU516U1 login.cgi sub_401A10 out-of-bounds write
Updated under an hour ago ()
This data is behind schedule: last updated Oct 26, 2026, 12:20 PM ET. We are working on it.Behind: CVE records (cvelistV5).
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It affects Wavlink NU516U1 and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi. Executing a manipulation of the argument ipaddr can lead to out-of-bounds write. The attack may be performed from remote. The exploit has been published and may be used. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-787, CWE-119
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Analyzed
- Record last updated
- Mar 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Wavlink NU516U1 wavlink:nu516u1 (from the name) | 251208 | CNA record |
wavlink wl-nu516u1_firmware wavlink:wl-nu516u1_firmware | 251208 | NVD |
References
- https://vuldb.com/?id.349649vdb-entry, technical-description, third-party-advisory
- https://vuldb.com/?ctiid.349649signature, permissions-required, vdb-entry
- https://vuldb.com/?submit.759226third-party-advisory, vdb-entry
- https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.mdrelated, exploit, vendor-advisory
- https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md#exp-exploit--pocexploit, vendor-advisory
- https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.binpatch, broken-link
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.