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Vulnerability record · CVE-2016-4476 · published 9 May 2016

CVE-2016-4476: W1.fi hostapd improper input validation vulnerability

WW1.Fi · Hostapd

hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject \n and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.

7.5 CVSS 3.1 High EPSS 2.9% · top 13.5% CWE-20 · Improper input validation
7.5CVSS 3.1 base score, v2 5.0
2.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject \n and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2016/05/03/12 Mailing ListThird Party Advisory
http://www.ubuntu.com/usn/USN-3455-1 Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/05/03/12 Mailing ListThird Party Advisory
http://www.ubuntu.com/usn/USN-3455-1 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-4476), CISA KEV, FIRST EPSS (scores of 2026-10-15). This page is refreshed as NVD updates the record.