CVE-2023-21656

CVE-2023-21656 is a high-severity vulnerability in Qualcomm Ar8035 Firmware with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• EPSS exploit prediction: 0% (2nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-20
• Affected product: Qualcomm Ar8035 Firmware
• Published: 2023-06-06
• Last modified: 2026-06-17

Description

Memory corruption in WLAN HOST while receiving an WMI event from firmware.

Frequently asked questions

What is CVE-2023-21656?

Memory corruption in WLAN HOST while receiving an WMI event from firmware.

How severe is CVE-2023-21656?

CVE-2023-21656 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-21656 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21656?

CVE-2023-21656 primarily affects Qualcomm Ar8035 Firmware. In total, 128 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21656?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-21656 published?

CVE-2023-21656 was published on 2023-06-06 and last updated on 2026-06-17.

References

• https://www.qualcomm.com/company/product-security/bulletins/june-2023-bulletin

Affected products (128)

• cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:csrb31024_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3991_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn3998_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn6750_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6390_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn685x-5_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn685x-1_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn785x-1_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:wcn785x-5_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qam8255p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qam8295p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qam8650p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qam8775p_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6175a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6310_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6320_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6554a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6564au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6574_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6584au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6595_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6678aq_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca6797aq_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca8081_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcc2073_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcc2076_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcm4325_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:qualcomm:qcm4490_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Qualcomm Ar8035 Firmware

• CVE-2025-27034 — Critical (CVSS 9.8): Memory corruption while selecting the PLMN from SOR failed list.
• CVE-2024-45569 — Critical (CVSS 9.8): Memory corruption while parsing the ML IE due to invalid frame content.
• CVE-2024-21473 — Critical (CVSS 9.8): Memory corruption while redirecting log file to any file location with any file name.
• CVE-2023-43553 — Critical (CVSS 9.8): Memory corruption while parsing beacon/probe response frame when AP sends more supported links in MLIE.
• CVE-2023-43552 — Critical (CVSS 9.8): Memory corruption while processing MBSSID beacon containing several subelement IE.
• CVE-2023-28582 — Critical (CVSS 9.8): Memory corruption in Data Modem while verifying hello-verify message during the DTLS handshake.

All CVEs affecting Qualcomm Ar8035 Firmware →

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