HOMEVULNERABILITIESCVE-2026-3661
HIGH

CVE-2026-3661

CWE-74Published: March 7, 2026· Updated: Mar 10, 2026

7.2
CVSS v3.1
EPSS:0.23%probability of exploitation in 30 daysPercentile:45.4th

Official Description

A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

NVD Source

Technical Analysis

CVE-2026-3661 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/jinhao118/cve/blob/main/WAVLINK_1.md
ADVISORYhttps://vuldb.com/?id.349550
ADVISORYhttps://vuldb.com/?submit.758227

All References (4)

→
https://github.com/jinhao118/cve/blob/main/WAVLINK_1.mdExploit · Third Party Advisory
→
https://vuldb.com/?ctiid.349550Permissions Required · VDB Entry
→
https://vuldb.com/?id.349550Third Party Advisory · VDB Entry
→
https://vuldb.com/?submit.758227Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2026-3661
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-74
CISA KEVNo
EPSS (30d)0.23%
Affected1 vendor
PublishedMar 7, 2026

Related CVEs (CWE-74)

CVE-2026-5018
9.8
CVE-2026-5334
9.8
CVE-2026-34041
9.8
CVE-2026-5035
9.8
CVE-2026-5017
9.8
CVE-2026-5333
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-3661 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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