How severe is CVE-2021-26257?

CVE-2021-26257 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-26257 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26257?

CVE-2021-26257 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-2021-26257?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-26257 published?

CVE-2021-26257 was published on 2022-08-18 and last updated on 2026-06-17.

CVE-2021-26257

CVE-2021-26257 is a medium-severity vulnerability in Intel Wi-fi 6 Ax411 Firmware with a CVSS 3.x base score of 5.5. 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: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (10th 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 denial of service via local access.

Frequently asked questions

What is CVE-2021-26257?: 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 denial of service via local access.
How severe is CVE-2021-26257?: CVE-2021-26257 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-26257 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26257?: CVE-2021-26257 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-2021-26257?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26257 published?: CVE-2021-26257 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-2021-33847 — High (CVSS 7.8): Improper buffer restrictions in firmware for some Intel(R) Wireless Bluetooth(R) and Killer(TM) Bluetooth(R) products…
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-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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