CVE-2026-4164
CVE-2026-4164 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- CVSS v4: 8.9
- EPSS exploit prediction: 2% (79th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-12204
- Weakness: CWE-74
- Published:
- Last modified:
Description
A flaw has been found in Wavlink WL-WN578W2 221110. Impacted is the function Delete_Mac_list/SetName/GuestWifi of the file /cgi-bin/wireless.cgi of the component POST Request Handler. Executing a manipulation can lead to command injection. It is possible to launch the attack remotely. The exploit has been published and may be used. It is recommended to upgrade the affected component.
Frequently asked questions
- What is CVE-2026-4164?
- A flaw has been found in Wavlink WL-WN578W2 221110. Impacted is the function Delete_Mac_list/SetName/GuestWifi of the file /cgi-bin/wireless.cgi of the component POST Request Handler. Executing a manipulation can lead to command injection. It is possible to launch the attack remotely. The exploit has been published and may be used. It is recommended to upgrade the affected component.
- How severe is CVE-2026-4164?
- CVE-2026-4164 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-4164 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-4164?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-4164 have an EU (EUVD) identifier?
- Yes. CVE-2026-4164 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12204.
- When was CVE-2026-4164 published?
- CVE-2026-4164 was published on 2026-03-16 and last updated on 2026-06-17.
References
- https://dl.wavlink.com/firmware/RD/WINSTAR_WN578W2-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin
- https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_1/README.md
- https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_2/README.md
- https://vuldb.com/?ctiid.351071
- https://vuldb.com/?id.351071
- https://vuldb.com/?submit.768292
- https://vuldb.com/?submit.768293
- https://vuldb.com/?submit.768294
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