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  4. CVE 2026 18607 wavlink nu516 lighttpd uploadcgi strcpy stack
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Back to active CVEs
High · CVSS 8.7CVE-2026-18607

Wavlink NU516 lighttpd upload.cgi strcpy stack-based overflowCVE-2026-18607

Answer in brief

CVE-2026-18607 records a High severity (CVSS 8.7) vulnerability in Wavlink NU516 lighttpd upload.cgi strcpy stack-based overflow. The current sources do not mark it as known exploited. The current feed maps Wavlink/etc. WN529 (generic), Wavlink/NU516 (generic), Wavlink/WN529 (generic), Wavlink/WN530 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 3, 2026Updated Aug 12, 2026Source checked Nov 4, 2026First seen by HOL Aug 3, 2026Material review Aug 12, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
12 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Wavlink/etc. WN529 (generic), Wavlink/NU516 (generic), Wavlink/WN529 (generic), Wavlink/WN530 (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Wavlink/etc. WN529generic20260609Not reported
Wavlink/NU516generic20260609Not reported
Wavlink/WN529generic20260609Not reported
Wavlink/WN530generic20260609Not reported
Wavlink/WN531generic20260609Not reported
Wavlink/WN535generic20260609Not reported
Wavlink/WN536generic20260609Not reported
Wavlink/WN551generic20260609Not reported
Wavlink/WN557generic20260609Not reported
Wavlink/WN570Hgeneric20260609Not reported
Wavlink/WN572generic20260609Not reported
Wavlink/WN573generic20260609Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Wavlink/etc. WN529, Wavlink/NU516, Wavlink/WN529.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 12, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 3, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Buffer overflow in SAML authentication post-back URL handling in libsnowflakeclient and Snowflake PHP PDO DriverAlso CWE-121
  • Apache OpenOffice: Stack overflow in CFF hint handlingAlso CWE-121

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-119, CWE-121
Source
CVE List V5
Source checked
Nov 4, 2026
References
5 linked sources
Open source record