CVE-2026-18607
Received Received - Intake

Stack-Based Buffer Overflow in Wavlink WN572 Series via HTTP_COOKIE

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: VulDB

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.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-18607
EUVD
EUVD-2026-52371

Affected Vendors & Products

Showing 11 associated CPEs
Vendor Product Version / Range
wavlink wn572 *
wavlink wn570h *
wavlink wn573 *
wavlink wn529 to 20260609 (inc)
wavlink wn530 to 20260609 (inc)
wavlink wn531 to 20260609 (inc)
wavlink wn535 to 20260609 (inc)
wavlink wn536 *
wavlink wn551 *
wavlink wn557 *
lighttpd lighttpd *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This vulnerability is a stack-based buffer overflow in Wavlink routers and access points. It occurs in the file upload.cgi component of the lighttpd web server due to an unsafe strcpy function. Attackers can exploit this by manipulating the HTTP_COOKIE argument to overflow the stack, potentially executing arbitrary code remotely.

Detection Guidance

This vulnerability involves a stack-based buffer overflow in Wavlink devices via the upload.cgi component due to improper handling of the HTTP_COOKIE argument. To detect it, check for unusual network traffic targeting Wavlink devices, particularly requests to upload.cgi with long or malformed cookie values. Inspect logs for crashes or memory corruption errors in lighttpd processes. Use network scanners to identify vulnerable firmware versions (up to 20260609) on affected models.

Impact Analysis

If exploited, this vulnerability could allow remote attackers to take control of affected devices, execute malicious code, or cause denial-of-service conditions. Users of vulnerable Wavlink devices may face unauthorized access, data theft, or device malfunction.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected devices may face compliance breaches, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Immediately update affected Wavlink devices to the latest firmware version released after 20260609. Disable remote access to the device's web interface if not required. Monitor network traffic for unusual activity involving file uploads or HTTP_COOKIE manipulation.

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