Wavlink WL-WN579A3 POST Request wireless.cgi GuestWifi command injection

published 2026-03-14 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-12192

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.2%; EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits: 0; none known

A vulnerability was detected in Wavlink WL-WN579A3 220323. This issue affects the function SetName/GuestWifi of the file /cgi-bin/wireless.cgi of the component POST Request Handler. Performing a manipulation results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading the affected component is recommended.

Patch / fix

links 1

dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628… patch

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 7 mo ago (2026-03-17)

Exploit prediction

2.19% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/Litengzheng/vul_db/blob/main/WL-WN579A3/vul_10/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	3.0	9.8	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:OF/RC:C
CNA	4.0	8.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Wavlink WL-WN579A3

Classification

Weakness

CWE-77 Improper Neutralization of Special Elements used in a Command
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

dl.wavlink.com /firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin
patch
github.com /Litengzheng/vul_db/blob/main/WL-WN579A3/vul_10/README.md
exploit
vuldb.com /?id.351070
vdb-entry, technical-description
vuldb.com /?ctiid.351070
signature, permissions-required
vuldb.com /?submit.765327
third-party-advisory
vuldb.com /?submit.765328
third-party-advisory
github.com /Litengzheng/vul_db/blob/main/WL-WN579A3/vul_9/README.md
related

Sources

CVE List CVE-2026-4163
NVD CVE-2026-4163

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary