CVE-2026-18607

Wavlink NU516 lighttpd upload.cgi strcpy stack-based overflow

Published Aug 3, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
A security vulnerability has been detected in Wavlink WN572, WN570H, WN573, WN529, WN530, WN531, WN535, etc. WN529, WN530, WN531, WN535, WN536, WN551, WN557 and NU516 up to 20260609. Affected by this issue is the function strcpy of the file upload.cgi of the component lighttpd. The manipulation of the argument HTTP_COOKIE leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A security vulnerability has been detected in Wavlink WN572, WN570H, WN573, WN529, WN530, WN531, WN535, etc. WN529, WN530, WN531, WN535, WN536, WN551, WN557 and NU516 up to 20260609. Affected by this issue is the function strcpy of the file upload.cgi of the component lighttpd. The manipulation of the argument HTTP_COOKIE leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.
Title Wavlink NU516 lighttpd upload.cgi strcpy stack-based overflow
First Time appeared Wavlink
Wavlink etc. Wn529
Wavlink nu516
Wavlink wn529
Wavlink wn530
Wavlink wn531
Wavlink wn535
Wavlink wn536
Wavlink wn551
Wavlink wn557
Wavlink wn570h
Wavlink wn572
Wavlink wn573
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:a:wavlink:etc._wn529:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:nu516:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn529:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn530:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn531:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn535:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn536:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn551:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn557:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn570h:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn572:*:*:*:*:*:*:*:*
cpe:2.3:a:wavlink:wn573:*:*:*:*:*:*:*:*
Vendors & Products Wavlink
Wavlink etc. Wn529
Wavlink nu516
Wavlink wn529
Wavlink wn530
Wavlink wn531
Wavlink wn535
Wavlink wn536
Wavlink wn551
Wavlink wn557
Wavlink wn570h
Wavlink wn572
Wavlink wn573
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P'}