How severe is CVE-2021-33847?

CVE-2021-33847 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-2021-33847 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33847?

CVE-2021-33847 primarily affects Intel Wi-fi 6 Ax411 Firmware. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33847?

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-2021-33847 published?

CVE-2021-33847 was published on 2022-08-18 and last updated on 2026-06-17.

CVE-2021-33847

CVE-2021-33847 is a high-severity vulnerability in Intel Wi-fi 6 Ax411 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Intel Wi-fi 6 Ax411 Firmware
Published: 2022-08-18
Last modified: 2026-06-17

Description

Improper buffer restrictions in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products before version 22.120 may allow an authenticated user to potentially enable escalation of privilege via local access.

Frequently asked questions

What is CVE-2021-33847?: Improper buffer restrictions in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products before version 22.120 may allow an authenticated user to potentially enable escalation of privilege via local access.
How severe is CVE-2021-33847?: CVE-2021-33847 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-2021-33847 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33847?: CVE-2021-33847 primarily affects Intel Wi-fi 6 Ax411 Firmware. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33847?: 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-2021-33847 published?: CVE-2021-33847 was published on 2022-08-18 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00628.html

Affected products (18)

cpe:2.3:o:intel:wi-fi_6_ax411_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax211_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax210_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax201_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wireless-ac_9560_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wireless-ac_9462_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wireless-ac_9461_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wireless-ac_9260_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dual_band_wireless-ac_8265_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dual_band_wireless-ac_8260_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dual_band_wireless-ac_3168_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wireless_7265_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dual_band_wireless-ac_3165_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:killer_wi-fi_6e_ax1690_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:killer_wi-fi_6e_ax1675_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:killer_wi-fi_6_ax1650_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:killer_wireless-ac_1550_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Wi-fi 6 Ax411 Firmware

CVE-2021-23179 — High (CVSS 7.1): Out of bounds read in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products before…
CVE-2021-26950 — Medium (CVSS 5.5): Out of bounds read in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products before…
CVE-2021-26257 — Medium (CVSS 5.5): Improper buffer restrictions in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products…
CVE-2022-26047 — Medium (CVSS 4.3): Improper input validation for some Intel(R) PROSet/Wireless WiFi, Intel vPro(R) CSME WiFi and Killer(TM) WiFi products…

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