What is CVE-2026-18607?

CVE-2026-18607 is a high-severity vulnerability in Wavlink Etc. Wn529, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-08-03.

How severe is CVE-2026-18607?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Wavlink Etc. Wn529

CVE-2026-18607

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.

Vulnerability class: Buffer Overflow

Published 2026-08-03 · last modified 2026-08-12.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored 2026-11-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Wavlink Etc. Wn529 — versions 20260609
Wavlink Nu516 — versions 20260609
Wavlink Wn529 — versions 20260609
Wavlink Wn530 — versions 20260609
Wavlink Wn531 — versions 20260609
Wavlink Wn535 — versions 20260609
Wavlink Wn536 — versions 20260609
Wavlink Wn551 — versions 20260609
Wavlink Wn557 — versions 20260609
Wavlink Wn570h — versions 20260609

Weakness classification (CWE)

References

github.com/0xcc12138/WAVLINK-vul (exploit)
vuldb.com/cve/CVE-2026-18607 (third-party-advisory)
vuldb.com/submit/852637 (third-party-advisory)
vuldb.com/vuln/385530 (technical-description, vdb-entry)
vuldb.com/vuln/385530/cti (signature, permissions-required)

Frequently asked questions

What is CVE-2026-18607?: CVE-2026-18607 is a high-severity vulnerability in Wavlink Etc. Wn529, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-08-03.
How severe is CVE-2026-18607?: High severity. CVSS v3 base score is 8.8 out of 10.