In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier…
Priority LOW 27CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishandled in tls/pkcs1.c and tls/x509v3.c.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01637 76th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:w1.fi:hostapd:2.9:*:*:*:*:*:*:* | 2.9 | Vulnerable | Wi-Fi Alliance |
| cpe:2.3:a:w1.fi:wpa_supplicant:2.9:*:*:*:*:*:*:* | 2.9 | Vulnerable | Wi-Fi Alliance |
- cpe:2.3:a:w1.fi:hostapd:2.9:*:*:*:*:*:*:* Versions 2.9 Vulnerable ·Wi-Fi Alliance
- cpe:2.3:a:w1.fi:wpa_supplicant:2.9:*:*:*:*:*:*:* Versions 2.9 Vulnerable ·Wi-Fi Alliance
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30004
- 2026-10-03 Alias added: GHSA-mwxw-68wg-34jm
References
More Wi-Fi Alliance Hostapd vulnerabilities
- TI-2020-10094 The Open Connectivity Foundation UPnP specification before 2020-04-17 does not forbid the… CVSS 3.1HIGH 7.5
- TI-2022-07426 The implementations of SAE in hostapd before 2.10 and wpa_supplicant before 2.10 are… CVSS 3.1CRITICAL 9.8
- TI-2022-07427 The implementations of EAP-pwd in hostapd before 2.10 and wpa_supplicant before 2.10 are… CVSS 3.1CRITICAL 9.8
- TI-2019-06933 Improper authentication in Wi-Fi Alliance hostapd with EAP-pwd support CVSS 3.0HIGH 8.1
- TI-2017-09721 Wi-Fi Protected Access (WPA and WPA2) that supports IEEE 802.11r allows reinstallation of… CVSS 3.0HIGH 8.1
- TI-2019-06935 Origin validation error in Wi-Fi Alliance hostapd with EAP-pwd support CVSS 3.1HIGH 8.1
Sources
- CVE-2021-30004 · CVE Program
- CVE-2021-30004 · NVD
- FIRST EPSS
- GHSA-mwxw-68wg-34jm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-30004 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences