CVE-2023-21658 [High] | Out-of-bounds Read in Ar8035 Firmware

CVE-2023-21658 is rated Moderate Risk (40.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.38%). Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.15%	0.38%	+0.23%
2	2026-03-01	0.12%	0.15%	+0.03%
3	2025-11-21	—	0.12%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.15%

0.38%

+0.23%

2026-03-01

0.12%

0.15%

+0.03%

2025-11-21

—

0.12%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) No account or special rights needed—anonymous or random user is enough. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) No account or special rights needed—anonymous or random user is enough. 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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): No account or special rights needed—anonymous or random user is enough.
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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

7.5

3.1

HIGH

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): No account or special rights needed—anonymous or random user is enough.
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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

Affected software / configurations for CVE-2023-21658

Vendor	Product	Version	Raw CPE
qualcomm	ar8035_firmware	—	cpe:2.3:o:qualcomm:ar8035_firmware:-:::::::*
qualcomm	ar9380_firmware	—	cpe:2.3:o:qualcomm:ar9380_firmware:-:::::::*
qualcomm	csr8811_firmware	—	cpe:2.3:o:qualcomm:csr8811_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	immersive_home_214_platform_firmware	—	cpe:2.3:o:qualcomm:immersive_home_214_platform_firmware:-:::::::*
qualcomm	immersive_home_216_platform_firmware	—	cpe:2.3:o:qualcomm:immersive_home_216_platform_firmware:-:::::::*
qualcomm	immersive_home_316_platform_firmware	—	cpe:2.3:o:qualcomm:immersive_home_316_platform_firmware:-:::::::*
qualcomm	immersive_home_318_platform_firmware	—	cpe:2.3:o:qualcomm:immersive_home_318_platform_firmware:-:::::::*
qualcomm	ipq5010_firmware	—	cpe:2.3:o:qualcomm:ipq5010_firmware:-:::::::*
qualcomm	ipq5028_firmware	—	cpe:2.3:o:qualcomm:ipq5028_firmware:-:::::::*
qualcomm	ipq6000_firmware	—	cpe:2.3:o:qualcomm:ipq6000_firmware:-:::::::*
qualcomm	ipq6010_firmware	—	cpe:2.3:o:qualcomm:ipq6010_firmware:-:::::::*
qualcomm	ipq6018_firmware	—	cpe:2.3:o:qualcomm:ipq6018_firmware:-:::::::*
qualcomm	ipq6028_firmware	—	cpe:2.3:o:qualcomm:ipq6028_firmware:-:::::::*
qualcomm	ipq8064_firmware	—	cpe:2.3:o:qualcomm:ipq8064_firmware:-:::::::*
qualcomm	ipq8065_firmware	—	cpe:2.3:o:qualcomm:ipq8065_firmware:-:::::::*
qualcomm	ipq8068_firmware	—	cpe:2.3:o:qualcomm:ipq8068_firmware:-:::::::*
qualcomm	ipq8070a_firmware	—	cpe:2.3:o:qualcomm:ipq8070a_firmware:-:::::::*
qualcomm	ipq8071a_firmware	—	cpe:2.3:o:qualcomm:ipq8071a_firmware:-:::::::*
qualcomm	ipq8072a_firmware	—	cpe:2.3:o:qualcomm:ipq8072a_firmware:-:::::::*
qualcomm	ipq8074a_firmware	—	cpe:2.3:o:qualcomm:ipq8074a_firmware:-:::::::*
qualcomm	ipq8076_firmware	—	cpe:2.3:o:qualcomm:ipq8076_firmware:-:::::::*
qualcomm	ipq8076a_firmware	—	cpe:2.3:o:qualcomm:ipq8076a_firmware:-:::::::*
qualcomm	ipq8078_firmware	—	cpe:2.3:o:qualcomm:ipq8078_firmware:-:::::::*
qualcomm	ipq8078a_firmware	—	cpe:2.3:o:qualcomm:ipq8078a_firmware:-:::::::*
qualcomm	ipq8173_firmware	—	cpe:2.3:o:qualcomm:ipq8173_firmware:-:::::::*
qualcomm	ipq8174_firmware	—	cpe:2.3:o:qualcomm:ipq8174_firmware:-:::::::*
qualcomm	ipq9008_firmware	—	cpe:2.3:o:qualcomm:ipq9008_firmware:-:::::::*
qualcomm	ipq9574_firmware	—	cpe:2.3:o:qualcomm:ipq9574_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	qca2062_firmware	—	cpe:2.3:o:qualcomm:qca2062_firmware:-:::::::*
qualcomm	qca2064_firmware	—	cpe:2.3:o:qualcomm:qca2064_firmware:-:::::::*
qualcomm	qca2065_firmware	—	cpe:2.3:o:qualcomm:qca2065_firmware:-:::::::*
qualcomm	qca2066_firmware	—	cpe:2.3:o:qualcomm:qca2066_firmware:-:::::::*
qualcomm	qca4024_firmware	—	cpe:2.3:o:qualcomm:qca4024_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	qca8072_firmware	—	cpe:2.3:o:qualcomm:qca8072_firmware:-:::::::*
qualcomm	qca8075_firmware	—	cpe:2.3:o:qualcomm:qca8075_firmware:-:::::::*
qualcomm	qca8081_firmware	—	cpe:2.3:o:qualcomm:qca8081_firmware:-:::::::*
qualcomm	qca8082_firmware	—	cpe:2.3:o:qualcomm:qca8082_firmware:-:::::::*
qualcomm	qca8084_firmware	—	cpe:2.3:o:qualcomm:qca8084_firmware:-:::::::*
qualcomm	qca8085_firmware	—	cpe:2.3:o:qualcomm:qca8085_firmware:-:::::::*
qualcomm	qca8337_firmware	—	cpe:2.3:o:qualcomm:qca8337_firmware:-:::::::*
qualcomm	qca8386_firmware	—	cpe:2.3:o:qualcomm:qca8386_firmware:-:::::::*
qualcomm	qca9886_firmware	—	cpe:2.3:o:qualcomm:qca9886_firmware:-:::::::*
qualcomm	qca9888_firmware	—	cpe:2.3:o:qualcomm:qca9888_firmware:-:::::::*
qualcomm	qca9889_firmware	—	cpe:2.3:o:qualcomm:qca9889_firmware:-:::::::*
qualcomm	qca9980_firmware	—	cpe:2.3:o:qualcomm:qca9980_firmware:-:::::::*
qualcomm	qca9984_firmware	—	cpe:2.3:o:qualcomm:qca9984_firmware:-:::::::*
qualcomm	qca9985_firmware	—	cpe:2.3:o:qualcomm:qca9985_firmware:-:::::::*
qualcomm	qca9986_firmware	—	cpe:2.3:o:qualcomm:qca9986_firmware:-:::::::*
qualcomm	qca9990_firmware	—	cpe:2.3:o:qualcomm:qca9990_firmware:-:::::::*
qualcomm	qca9992_firmware	—	cpe:2.3:o:qualcomm:qca9992_firmware:-:::::::*
qualcomm	qca9994_firmware	—	cpe:2.3:o:qualcomm:qca9994_firmware:-:::::::*
qualcomm	qcc2073_firmware	—	cpe:2.3:o:qualcomm:qcc2073_firmware:-:::::::*
qualcomm	qcc2076_firmware	—	cpe:2.3:o:qualcomm:qcc2076_firmware:-:::::::*
qualcomm	qcm4490_firmware	—	cpe:2.3:o:qualcomm:qcm4490_firmware:-:::::::*
qualcomm	qcm6490_firmware	—	cpe:2.3:o:qualcomm:qcm6490_firmware:-:::::::*

References for CVE-2023-21658

URL	Tags
https://www.qualcomm.com/company/product-security/bulletins/june-2023-bulletin	Vendor Advisory

URL

CVE-2023-21658 | Buffer Over-Read in WLAN Firmware

Exploit prediction scoring system (EPSS) score for CVE-2023-21658

Common vulnerability scoring system (CVSS) metrics for CVE-2023-21658

Weakness enumeration for CVE-2023-21658

Affected software / configurations for CVE-2023-21658

References for CVE-2023-21658