HOMEVULNERABILITIESCVE-2026-3704
HIGH

CVE-2026-3704

CWE-74Published: March 8, 2026· Updated: Mar 10, 2026

7.2
CVSS v3.1
EPSS:0.20%probability of exploitation in 30 daysPercentile:41.9th

Official Description

A vulnerability has been found in Wavlink NU516U1 251208. This vulnerability affects the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. It is recommended to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

NVD Source

Technical Analysis

CVE-2026-3704 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

wavlink2 products
wl-nu516u1 firmwarewl-nu516u1
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.md
ADVISORYhttps://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.md#exp
ADVISORYhttps://vuldb.com/?id.349650
ADVISORYhttps://vuldb.com/?submit.759233

All References (6)

→
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.binBroken Link
→
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.mdExploit · Third Party Advisory
→
https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.md#expExploit · Third Party Advisory
→
https://vuldb.com/?ctiid.349650Permissions Required · VDB Entry
→
https://vuldb.com/?id.349650Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.759233Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2026-3704
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-74
CISA KEVNo
EPSS (30d)0.20%
Affected1 vendor
PublishedMar 8, 2026

Related CVEs (CWE-74)

CVE-2026-5033
9.8
CVE-2026-5019
9.8
CVE-2026-4470
9.8
CVE-2026-5176
9.8
CVE-2026-5020
9.8
CVE-2026-3410
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-3704 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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