Medium severity · published Aug 3, 2026
CVE-2026-18590
Wavlink WL-NU516U1 Admin Password adm.cgi set_sys_adm os command injection
6.3
CVSS
1.8%
EPSS
No
On KEV
Description
A vulnerability was determined in Wavlink WL-NU516U1 708c073-mt7628. Affected is the function set_sys_adm of the file adm.cgi of the component Admin Password Handler. This manipulation causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. It is suggested 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-NU516U1 · Wavlink
708c073-mt7628 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18590
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18590
dl.wavlink.com
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin
github.com
https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.md
vuldb.com
https://vuldb.com/cve/CVE-2026-18590
vuldb.com
https://vuldb.com/submit/850527
vuldb.com
https://vuldb.com/submit/850560
vuldb.com
https://vuldb.com/vuln/385418
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