CVE-2019-9497 [High] | Authentication Bypass in Hostapd

The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit. This vulnerability may allow an attacker to complete EAP-PWD authentication without knowing the password. However, unless the crypto library does not implement additional checks for the EC point, the attacker will not be able to derive the session key or complete the key exchange. Both hostapd with SAE support and wpa_supplicant with SAE support prior to and including version 2.4 are affected. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	11.47%	5.37%	-6.10%
2	2026-05-29	10.97%	11.47%	+0.50%
3	2026-05-22	—	10.97%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

11.47%

5.37%

-6.10%

2026-05-29

10.97%

11.47%

+0.50%

2026-05-22

—

10.97%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.1	3.0	HIGH	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.2	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.1

3.0

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.2

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2019-9497

vendor	priority	summary	link
`alpine`	high	CVE-2019-9497: 2 source package rows (hostapd, wpa_supplicant); 30 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 15, open 15.	https://security.alpinelinux.org/vuln/CVE-2019-9497
`debian`	not yet assigned	CVE-2019-9497 not yet assigned priority: Debian including 1 source packages (wpa), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2019-9497
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2019-9497
`suse`	low	CVE-2019-9497 severity low: SUSE including 26 source package names (hostapd-2.9-6.2, hostapd-2.9-bp150.15.1, …), 81 product×package rows across 76 product lines (Container rancher/elemental-teal-rt/5.3, Container rancher/elemental-teal-rt/5.4, … (76 product lines)): Fixed 72, Known Not Affected 9.	https://www.suse.com/security/cve/CVE-2019-9497/
`ubuntu`	medium	CVE-2019-9497 medium priority: Ubuntu including 2 source packages (wpa, wpasupplicant), 12 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 6, DNE 5, needs-triage 1.	https://ubuntu.com/security/CVE-2019-9497

Affected software / configurations for CVE-2019-9497

Vendor	Product	Version	Raw CPE
w1.fi	hostapd	<= 2.4	cpe:2.3:a:w1.fi:hostapd::::::::
w1.fi	hostapd	>= 2.5, <= 2.7	cpe:2.3:a:w1.fi:hostapd::::::::
w1.fi	wpa_supplicant	<= 2.4	cpe:2.3:a:w1.fi:wpa_supplicant::::::::
w1.fi	wpa_supplicant	>= 2.5, <= 2.7	cpe:2.3:a:w1.fi:wpa_supplicant::::::::
fedoraproject	fedora	28	cpe:2.3:o:fedoraproject:fedora:28:::::::*
fedoraproject	fedora	29	cpe:2.3:o:fedoraproject:fedora:29:::::::*
fedoraproject	fedora	30	cpe:2.3:o:fedoraproject:fedora:30:::::::*

References for CVE-2019-9497

URL	Tags
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.debian.org/debian-lts-announce/2019/07/msg00030.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/56OBBOJJSKRTDGEXZOVFSTP4HDSDBLAE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SVMJOFEYBGXZLFF5IOLW67SSOPKFEJP3/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDOZGR3T7FVO5JSZWK2QPR7AOFIEJTIZ/
https://seclists.org/bugtraq/2019/May/40
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc
https://w1.fi/security/2019-4/	Patch Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_19_16

URL

CVE-2019-9497 | The implementations of EAP-PWD in hostapd EAP Server and wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit

Exploit prediction scoring system (EPSS) score for CVE-2019-9497

Common vulnerability scoring system (CVSS) metrics for CVE-2019-9497

Weakness enumeration for CVE-2019-9497

OS Trackers for CVE-2019-9497

Affected software / configurations for CVE-2019-9497

References for CVE-2019-9497