CVE-2026-8191Public exploitNetwork attack vector

Authenticated command execution via unsanitized skiplist parameters

Published May 9, 2026 · Updated May 9, 2026

OS command injection in Wavlink WL-NU516U1 M16U1_V240425 allows remote authenticated users to execute arbitrary device commands. The wifi_region handler in /cgi-bin/adm.cgi passes attacker-controlled skiplist1 and skiplist2 values into an operating-system command without neutralizing shell syntax. A valid administrative-interface session is required; successful exploitation can start a shell process with the web service's device privileges.

CVSS severity8.8
High
EPSS probability6.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Wavlink WL-NU516U1 M16U1_V240425 allows remote authenticated users to execute arbitrary device commands. The wifi_region handler in /cgi-bin/adm.cgi passes attacker-controlled skiplist1 and skiplist2 values into an operating-system command without neutralizing shell syntax. A valid administrative-interface session is required; successful exploitation can start a shell process with the web service's device privileges.

The record

CVE
CVE-2026-8191
Published
May 9, 2026
Updated
May 9, 2026
Vendor
Wavlink
Product
WL-NU516U1
Classifications
CWE-78, CWE-77, T1059.004, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 9, 2026CVE publishedPublication date reported by the CVE source.
  2. May 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=M16U1_V240425

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Wavlink · WL-NU516U1version=M16U1_V240425

Published CVSS scores

6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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