CVE-2026-18588CWE-119CWE-121

CVE-2026-18588

Critical · published August 3, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
65.3
In the wild
Unconfirmed
What it is

A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01096 · 65.3th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-08-03T11:16Z
References (7)
https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin · [email protected]https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.md · [email protected]https://vuldb.com/cve/CVE-2026-18588 · [email protected]https://vuldb.com/submit/850500 · [email protected]https://vuldb.com/vuln/385416 · [email protected]https://vuldb.com/vuln/385416/cti · [email protected]https://vuldb.com/submit/850500 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 AUG 06:00Z
    Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow
    cvelistv5