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Vulnerability record · CVE-2019-9496 · published 17 April 2019

CVE-2019-9496: W1.fi hostapd improper authentication vulnerability

WW1.Fi · Hostapd

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

7.5 CVSS 3.0 High EPSS 4.7% · top 8.5% CWE-642 · CWE-642CWE-287 · Improper authentication
7.5CVSS 3.0 base score, v2 5.0
4.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps when processing the SAE confirm message when in hostapd/AP mode. All version of hostapd with SAE support are vulnerable. An attacker may force the hostapd process to terminate, performing a denial of service attack. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.7 are affected.

CVSS:3.0/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://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html
http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67S
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7
https://seclists.org/bugtraq/2019/May/40
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
https://w1.fi/security/2019-3/ PatchVendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_16
http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00021.html
http://packetstormsecurity.com/files/152914/FreeBSD-Security-Advisory-FreeBSD-SA-19-03.wpa.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67S
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7
https://seclists.org/bugtraq/2019/May/40
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
https://w1.fi/security/2019-3/ PatchVendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_16

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Source: NIST National Vulnerability Database (record CVE-2019-9496), CISA KEV, FIRST EPSS (scores of 2026-10-11). This page is refreshed as NVD updates the record.