CVE-2019-9495· NVD / CVE Program· CNA certcc

The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns

The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns. All versions of hostapd and wpa_supplicant with EAP-PWD support are vulnerable. The ability to install and execute applications is necessary for a successful attack. Memory access patterns are visible in a shared cache. Weak passwords may be cracked. Versions of hostapd/wpa_supplicant 2.7 and newer, are not vulnerable to the timing attack described in CVE-2019-9494. Both hostapd with EAP-pwd support and wpa_supplicant with EAP-pwd support prior to and including version 2.7 are affected.

LowCVSS 3.7 · v3.1—No exploit Fix available

Pre-auth

Published: Apr 17, 2019
Updated: Jun 16, 2026
EPSS: 3.5% · 89th percentile
CWE: CWE-524

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Action score

Monitor

Low priority for now.

CVSS: 14 / 40 · 3.7 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.5%

Affected systems

Vendor	Product	CPE
w1.fi	hostapd	cpe:2.3:a:w1.fi:hostapd
w1.fi	wpa supplicant	cpe:2.3:a:w1.fi:wpa_supplicant
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
opensuse	backports sle	cpe:2.3:a:opensuse:backports_sle
opensuse	leap	cpe:2.3:o:opensuse:leap
synology	radius server	cpe:2.3:a:synology:radius_server
synology	router manager	cpe:2.3:a:synology:router_manager
debian	debian linux	cpe:2.3:o:debian:debian_linux
freebsd	freebsd	cpe:2.3:o:freebsd:freebsd

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

debian debian linux8.0
fedoraproject fedora28
fedoraproject fedora29
fedoraproject fedora30
freebsd freebsd11.2
freebsd freebsd12.0
opensuse backports sle15.0
opensuse leap15.1
synology radius server3.0
synology router managerbefore 1.2.3-8017
w1.fi hostapdup to 2.7 inclusive
w1.fi wpa supplicantup to 2.7 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (certcc). Independent of NVD's CPE analysis and usually ahead of it.

Wi-Fi Alliance hostapd with EAP-pwd support
- 2.7 and later · up to and including 2.7affected
Wi-Fi Alliance wpa_supplicant with EAP-pwd support
- 2.7 and later · up to and including 2.7affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	wpa_supplicant	before 2.7-r2	2.7-r2
Debian:12	wpa	before 2:2.7+git20190128+0c1e29f-4	2:2.7+git20190128+0c1e29f-4
Debian:8	wpa	before 2.3-1+deb8u8	2.3-1+deb8u8
Debian:9	wpa	before 2:2.4-1+deb9u3	2:2.4-1+deb9u3
openSUSE:Leap 15.1	wpa_supplicant	before 2.9-lp151.5.10.1	2.9-lp151.5.10.1
openSUSE:Leap 15.2	wpa_supplicant	before 2.9-lp152.8.3.1	2.9-lp152.8.3.1
openSUSE:Tumbleweed	hostapd	before 2.9-6.2	2.9-6.2
openSUSE:Tumbleweed	wpa_supplicant	before 2.9-13.4	2.9-13.4
SUSE:HPE Helion OpenStack 8	wpa_supplicant	before 2.9-15.22.1	2.9-15.22.1
SUSE:Linux Enterprise Module for Basesystem 15 SP1	wpa_supplicant	before 2.9-4.20.1	2.9-4.20.1
SUSE:Linux Enterprise Server 12 SP5	wpa_supplicant	before 2.9-23.3.1	2.9-23.3.1
SUSE:Package Hub 15	hostapd	before 2.9-bp151.5.3.1	2.9-bp151.5.3.1
SUSE:Package Hub 15	hostapd	before 2.9-bp151.5.3.1	2.9-bp151.5.3.1

Same product

w1.fi: all records

Other highest-scoring records for the same primary product.

CVE-2022-23304The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side-channel attacks as a result of c
40Plan
CVE-2022-23303The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are vulnerable to side channel attacks as a result of cache
40Plan
CVE-2019-9499The implementations of EAP-PWD in wpa_supplicant EAP Peer do not validate the scalar and element values in EAP-pwd-Commit
33Monitor
CVE-2019-9498The implementations of EAP-PWD in hostapd EAP Server do not validate the scalar and element values in EAP-pwd-Commit
33Monitor
CVE-2019-9497The 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
33Monitor
CVE-2019-10064hostapd before 2.6, in EAP mode, makes calls to the rand() and random() standard library functions without any preceding srand() or srandom(
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:wpa_supplicant	2.7-r2 · Alpine:v3.10	Package registry (OSV)
debian:wpa	2:2.7+git20190128+0c1e29f-4 · Debian:12	Package registry (OSV)
opensuse:hostapd	2.9-bp151.5.3.1 · openSUSE:Leap 15.1	Package registry (OSV)
opensuse:wpa_supplicant	2.9-lp151.5.10.1 · openSUSE:Leap 15.1	Package registry (OSV)
suse:hostapd	2.9-bp151.5.3.1 · SUSE:Package Hub 15	Package registry (OSV)
suse:wpa_supplicant	2.9-4.20.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: low · data can be read
Integrity: none
Availability: none

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: Low
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-524 · Use of Cache Containing Sensitive Information

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

Lifting Sensitive Data Embedded in CacheCAPEC-204Medium

ATT&CK techniques

Data from Local SystemT1005

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records