What’s Vulnerable › Vulnerabilities

CVE-2026-18607: Wavlink NU516 lighttpd upload.cgi strcpy stack-based overflow

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-03 · updated 2026-08-12
• Weakness: CWE-119

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.

Affected products

• Wavlink etc. WN529: 20260609
• Wavlink NU516: 20260609
• Wavlink WN529: 20260609
• Wavlink WN530: 20260609
• Wavlink WN531: 20260609
• Wavlink WN535: 20260609
• Wavlink WN536: 20260609
• Wavlink WN551: 20260609
• Wavlink WN557: 20260609
• Wavlink WN570H: 20260609
• Wavlink WN572: 20260609
• Wavlink WN573: 20260609

References

• https://github.com/0xcc12138/WAVLINK-vul
• https://vuldb.com/cve/CVE-2026-18607
• https://vuldb.com/submit/852637
• https://vuldb.com/vuln/385530
• https://vuldb.com/vuln/385530/cti

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