CVE•Published 2026-03-26•Modified 2026-04-30•1 article on news•6 live references•NVD data
CVE-2026-4861Wavlink · Wl-nu516u1_firmware
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
16
Exploit Prediction Scoring System · top 84% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-03-26
Modified 2026-04-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-4861Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Wl-nu516u1 Firmware"Hosts Shodan identified as running Wl-nu516u1 Firmware.
More intel sources (5)
Shodan report
vuln:CVE-2026-4861Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-4861Censys host search filtered to this CVE id.
grep.app
CVE-2026-4861Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-4861GitHub code search for direct mentions.
Google dork
"CVE-2026-4861" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.