CVE-2026-8189: A vulnerability was found in Wavlink NU516U1 M16U1_V240425

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MEDIUM 6.3MITIGATE

CVE-2026-8189 is a medium-severity flaw (CVSS 6.3) affecting wl-nu516u1 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Wavlink NU516U1 M16U1_V240425. Affected by this vulnerability is the function wzdrepeater of the file /cgi-bin/adm.cgi. The manipulation of the argument wlan_bssid/sel_Automode/sel_EncrypTyp results in os command injection. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure.

Why this priority

EPSS top 5%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	7.8% (top 5%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2026-05-09
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: wavlink

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-09 17:16 UTCPublished CVE record published
2026-07-24 08:10 UTCUpdated Record last modified

wavlink wl-nu516u1 firmware MITIGATE

Affected: m16u1_v240425

Fixed in: no fixed release known

Safe to downgrade to: a release before m16u1_v240425

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-8189?

wl-nu516u1 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-8189 being exploited?

CVE-2026-8189 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-8189 affect?

CVE-2026-8189 affects wl-nu516u1 firmware. Severity is medium (CVSS 6.3). A vulnerability was found in Wavlink NU516U1 M16U1_V240425. Affected by this vulnerability is the function wzdrepeater of the file /cgi-bin/adm.cgi. The manipulation of the argument wlan_bssid/sel_Automode/sel_EncrypTyp results in os comman

How urgent is CVE-2026-8189?

Priority 51/100. EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2026-8188 MEDIUM 6.3 MITIGATE A vulnerability has been found in Wavlink NU516U1 M16U1_V240425
CVE-2026-8190 MEDIUM 6.3 MITIGATE A vulnerability was determined in Wavlink NU516U1 M16U1_V240425
CVE-2026-8191 MEDIUM 6.3 MITIGATE A vulnerability was identified in Wavlink NU516U1 M16U1_V240425
CVE-2026-8192 MEDIUM 6.3 MITIGATE A security flaw has been discovered in Wavlink NU516U1 M16U1_V240425
CVE-2026-4861 HIGH 8.8 MITIGATE A weakness has been identified in Wavlink WL-NU516U1 260227

References

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