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CVE-2019-9496· NVD / CVE Program· CNA certcc

An invalid authentication sequence could result in the hostapd process terminating due to missing state validation steps

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.6% (FIRST EPSS); higher than 91.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: hostapd (Alpine:v3.10) 2.8-r0; hostapd (Alpine:v3.6) 2.6-r3; hostapd (Alpine:v3.7) 2.6-r5.

Low priority for now. Upgrade to hostapd (Alpine:v3.10) 2.8-r0; hostapd (Alpine:v3.6) 2.6-r3; hostapd (Alpine:v3.7) 2.6-r5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.5 · v3.0—No exploit Fix available
Published
Apr 17, 2019
Updated
Jun 16, 2026
EPSS
4.6% · 91th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.6%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2019-9496

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
w1.fihostapd
w1.fiwpa supplicant
fedoraprojectfedora

Affected versions

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

  • fedoraproject fedora28
  • fedoraproject fedora29
  • fedoraproject fedora30
  • 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 SAE support

    • 2.7 and later · up to and including 2.7affected

  • Wi-Fi Alliance wpa_supplicant with SAE 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.

EcosystemPackageAffected rangeFix
Alpine:v3.10hostapdbefore 2.8-r02.8-r0
Alpine:v3.6hostapdbefore 2.6-r32.6-r3
Alpine:v3.7hostapdbefore 2.6-r52.6-r5
Alpine:v3.8hostapdbefore 2.6-r62.6-r6
Alpine:v3.9hostapdbefore 2.7-r32.7-r3
Debian:12wpabefore 2:2.7+git20190128+0c1e29f-42:2.7+git20190128+0c1e29f-4
openSUSE:Tumbleweedhostapdbefore 2.9-6.22.9-6.2
SUSE:Package Hub 15hostapdbefore 2.9-bp151.5.3.12.9-bp151.5.3.1
SUSE:Package Hub 15hostapdbefore 2.9-bp151.5.3.12.9-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

Published before and after this one in the same product

  • ← EarlierCVE-2019-9494Apr 17, 2019 · The implementations of SAE in hostapd and wpa_supplicant are vulnerable to side-channel attacks
    24Monitor
  • ← EarlierCVE-2019-9495Apr 17, 2019 · The implementations of EAP-PWD in hostapd and wpa_supplicant are vulnerable to side-channel attacks as a result of cache access patterns
    15Monitor
  • Later →CVE-2019-9497Apr 17, 2019 · 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
    33Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
alpine:hostapd2.8-r0 · Alpine:v3.10Package registry (OSV)
debian:wpa2:2.7+git20190128+0c1e29f-4 · Debian:12Package registry (OSV)
opensuse:hostapd2.9-bp151.5.3.1 · openSUSE:Leap 15.1Package registry (OSV)
suse:hostapd2.9-bp151.5.3.1 · SUSE:Package Hub 15Package 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-1% in 7 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.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-642 · External Control of Critical State Data

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Change log

  1. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records