CVE-2023-21656 | Improper Input Validation in WLAN HOST

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

Published: 2023-06-06 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-21656 is rated Low Risk (37/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-21656

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.04% 0.05% +0.01%
2 2025-11-18 0.05% 0.04% -0.01%
3 2025-03-19 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21656

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
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.
 1.8 5.9 [email protected]
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
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.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2023-21656

Affected software / configurations for CVE-2023-21656

Vendor Product Version Raw CPE
qualcomm ar8035_firmware — cpe:2.3:o:qualcomm:ar8035_firmware:-:*:*:*:*:*:*:*
qualcomm csra6620_firmware — cpe:2.3:o:qualcomm:csra6620_firmware:-:*:*:*:*:*:*:*
qualcomm csra6640_firmware — cpe:2.3:o:qualcomm:csra6640_firmware:-:*:*:*:*:*:*:*
qualcomm csrb31024_firmware — cpe:2.3:o:qualcomm:csrb31024_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3991_firmware — cpe:2.3:o:qualcomm:wcn3991_firmware:-:*:*:*:*:*:*:*
qualcomm wcn3998_firmware — cpe:2.3:o:qualcomm:wcn3998_firmware:-:*:*:*:*:*:*:*
qualcomm wcn6750_firmware — cpe:2.3:o:qualcomm:wcn6750_firmware:-:*:*:*:*:*:*:*
qualcomm qca6390_firmware — cpe:2.3:o:qualcomm:qca6390_firmware:-:*:*:*:*:*:*:*
qualcomm wcn685x-5_firmware — cpe:2.3:o:qualcomm:wcn685x-5_firmware:-:*:*:*:*:*:*:*
qualcomm wcn685x-1_firmware — cpe:2.3:o:qualcomm:wcn685x-1_firmware:-:*:*:*:*:*:*:*
qualcomm wcn785x-1_firmware — cpe:2.3:o:qualcomm:wcn785x-1_firmware:-:*:*:*:*:*:*:*
qualcomm wcn785x-5_firmware — cpe:2.3:o:qualcomm:wcn785x-5_firmware:-:*:*:*:*:*:*:*
qualcomm qam8255p_firmware — cpe:2.3:o:qualcomm:qam8255p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8295p_firmware — cpe:2.3:o:qualcomm:qam8295p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8650p_firmware — cpe:2.3:o:qualcomm:qam8650p_firmware:-:*:*:*:*:*:*:*
qualcomm qam8775p_firmware — cpe:2.3:o:qualcomm:qam8775p_firmware:-:*:*:*:*:*:*:*
qualcomm qca6175a_firmware — cpe:2.3:o:qualcomm:qca6175a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6310_firmware — cpe:2.3:o:qualcomm:qca6310_firmware:-:*:*:*:*:*:*:*
qualcomm qca6320_firmware — cpe:2.3:o:qualcomm:qca6320_firmware:-:*:*:*:*:*:*:*
qualcomm qca6391_firmware — cpe:2.3:o:qualcomm:qca6391_firmware:-:*:*:*:*:*:*:*
qualcomm qca6426_firmware — cpe:2.3:o:qualcomm:qca6426_firmware:-:*:*:*:*:*:*:*
qualcomm qca6436_firmware — cpe:2.3:o:qualcomm:qca6436_firmware:-:*:*:*:*:*:*:*
qualcomm qca6554a_firmware — cpe:2.3:o:qualcomm:qca6554a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6564au_firmware — cpe:2.3:o:qualcomm:qca6564au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574_firmware — cpe:2.3:o:qualcomm:qca6574_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574a_firmware — cpe:2.3:o:qualcomm:qca6574a_firmware:-:*:*:*:*:*:*:*
qualcomm qca6574au_firmware — cpe:2.3:o:qualcomm:qca6574au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6584au_firmware — cpe:2.3:o:qualcomm:qca6584au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595_firmware — cpe:2.3:o:qualcomm:qca6595_firmware:-:*:*:*:*:*:*:*
qualcomm qca6595au_firmware — cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*
qualcomm qca6678aq_firmware — cpe:2.3:o:qualcomm:qca6678aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca6696_firmware — cpe:2.3:o:qualcomm:qca6696_firmware:-:*:*:*:*:*:*:*
qualcomm qca6698aq_firmware — cpe:2.3:o:qualcomm:qca6698aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca6797aq_firmware — cpe:2.3:o:qualcomm:qca6797aq_firmware:-:*:*:*:*:*:*:*
qualcomm qca8081_firmware — cpe:2.3:o:qualcomm:qca8081_firmware:-:*:*:*:*:*:*:*
qualcomm qca8337_firmware — cpe:2.3:o:qualcomm:qca8337_firmware:-:*:*:*:*:*:*:*
qualcomm qcc2073_firmware — cpe:2.3:o:qualcomm:qcc2073_firmware:-:*:*:*:*:*:*:*
qualcomm qcc2076_firmware — cpe:2.3:o:qualcomm:qcc2076_firmware:-:*:*:*:*:*:*:*
qualcomm qcm4325_firmware — cpe:2.3:o:qualcomm:qcm4325_firmware:-:*:*:*:*:*:*:*
qualcomm qcm4490_firmware — cpe:2.3:o:qualcomm:qcm4490_firmware:-:*:*:*:*:*:*:*
qualcomm qcm6490_firmware — cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*
qualcomm qcn6024_firmware — cpe:2.3:o:qualcomm:qcn6024_firmware:-:*:*:*:*:*:*:*
qualcomm qcn9024_firmware — cpe:2.3:o:qualcomm:qcn9024_firmware:-:*:*:*:*:*:*:*
qualcomm qcs410_firmware — cpe:2.3:o:qualcomm:qcs410_firmware:-:*:*:*:*:*:*:*
qualcomm qcs4490_firmware — cpe:2.3:o:qualcomm:qcs4490_firmware:-:*:*:*:*:*:*:*
qualcomm qcs610_firmware — cpe:2.3:o:qualcomm:qcs610_firmware:-:*:*:*:*:*:*:*
qualcomm qcs6490_firmware — cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*
qualcomm qcs8550_firmware — cpe:2.3:o:qualcomm:qcs8550_firmware:-:*:*:*:*:*:*:*
qualcomm sa4150p_firmware — cpe:2.3:o:qualcomm:sa4150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa4155p_firmware — cpe:2.3:o:qualcomm:sa4155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6145p_firmware — cpe:2.3:o:qualcomm:sa6145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6150p_firmware — cpe:2.3:o:qualcomm:sa6150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa6155_firmware — cpe:2.3:o:qualcomm:sa6155_firmware:-:*:*:*:*:*:*:*
qualcomm sa6155p_firmware — cpe:2.3:o:qualcomm:sa6155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8145p_firmware — cpe:2.3:o:qualcomm:sa8145p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8150p_firmware — cpe:2.3:o:qualcomm:sa8150p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8155_firmware — cpe:2.3:o:qualcomm:sa8155_firmware:-:*:*:*:*:*:*:*
qualcomm sa8155p_firmware — cpe:2.3:o:qualcomm:sa8155p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8195p_firmware — cpe:2.3:o:qualcomm:sa8195p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8255p_firmware — cpe:2.3:o:qualcomm:sa8255p_firmware:-:*:*:*:*:*:*:*
qualcomm sa8295p_firmware — cpe:2.3:o:qualcomm:sa8295p_firmware:-:*:*:*:*:*:*:*
qualcomm sd_8_gen1_5g_firmware — cpe:2.3:o:qualcomm:sd_8_gen1_5g_firmware:-:*:*:*:*:*:*:*
qualcomm sd835_firmware — cpe:2.3:o:qualcomm:sd835_firmware:-:*:*:*:*:*:*:*
qualcomm sd865_5g_firmware — cpe:2.3:o:qualcomm:sd865_5g_firmware:-:*:*:*:*:*:*:*
qualcomm sd888_firmware — cpe:2.3:o:qualcomm:sd888_firmware:-:*:*:*:*:*:*:*
qualcomm sdm429w_firmware — cpe:2.3:o:qualcomm:sdm429w_firmware:-:*:*:*:*:*:*:*
qualcomm sdx55_firmware — cpe:2.3:o:qualcomm:sdx55_firmware:-:*:*:*:*:*:*:*
qualcomm sm4450_firmware — cpe:2.3:o:qualcomm:sm4450_firmware:-:*:*:*:*:*:*:*
qualcomm sm7315_firmware — cpe:2.3:o:qualcomm:sm7315_firmware:-:*:*:*:*:*:*:*
qualcomm sm7325p_firmware — cpe:2.3:o:qualcomm:sm7325p_firmware:-:*:*:*:*:*:*:*
qualcomm smart_audio_400_platform_firmware — cpe:2.3:o:qualcomm:smart_audio_400_platform_firmware:-:*:*:*:*:*:*:*
qualcomm sm4375_firmware — cpe:2.3:o:qualcomm:sm4375_firmware:-:*:*:*:*:*:*:*
qualcomm sdm429_firmware — cpe:2.3:o:qualcomm:sdm429_firmware:-:*:*:*:*:*:*:*
qualcomm sm4250-aa_firmware — cpe:2.3:o:qualcomm:sm4250-aa_firmware:-:*:*:*:*:*:*:*
qualcomm sm4350_firmware — cpe:2.3:o:qualcomm:sm4350_firmware:-:*:*:*:*:*:*:*
qualcomm sm4350-ac_firmware — cpe:2.3:o:qualcomm:sm4350-ac_firmware:-:*:*:*:*:*:*:*
qualcomm sm6225_firmware — cpe:2.3:o:qualcomm:sm6225_firmware:-:*:*:*:*:*:*:*
qualcomm sm6225-ad_firmware — cpe:2.3:o:qualcomm:sm6225-ad_firmware:-:*:*:*:*:*:*:*
qualcomm sm6375_firmware — cpe:2.3:o:qualcomm:sm6375_firmware:-:*:*:*:*:*:*:*
qualcomm sm7325_firmware — cpe:2.3:o:qualcomm:sm7325_firmware:-:*:*:*:*:*:*:*

References for CVE-2023-21656

cvelogic Threat Intelligence