How severe is CVE-2021-26254?

CVE-2021-26254 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-2021-26254 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26254?

CVE-2021-26254 primarily affects Intel Killer Ac 1550 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26254?

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

When was CVE-2021-26254 published?

CVE-2021-26254 was published on 2022-08-18 and last updated on 2026-06-17.

CVE-2021-26254

CVE-2021-26254 is a medium-severity vulnerability in Intel Killer Ac 1550 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Intel Killer Ac 1550 Firmware
Published: 2022-08-18
Last modified: 2026-06-17

Description

Out of bounds read for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged user to potentially enable denial of service via local access.

Frequently asked questions

What is CVE-2021-26254?: Out of bounds read for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged user to potentially enable denial of service via local access.
How severe is CVE-2021-26254?: CVE-2021-26254 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-2021-26254 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26254?: CVE-2021-26254 primarily affects Intel Killer Ac 1550 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26254?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26254 published?: CVE-2021-26254 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-00621.html

Affected products (9)

cpe:2.3:o:intel:killer_ac_1550_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:killer_wi-fi_6_ax1650_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:proset_wi-fi_6e_ax210_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6e_ax211_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6_ax201_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:wi-fi_6e_ax411_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Killer Ac 1550 Firmware

CVE-2021-0163 — High (CVSS 8.8): Improper Validation of Consistency within input in software for Intel(R) PROSet/Wireless Wi-Fi and Killer(TM) Wi-Fi in…
CVE-2021-0162 — High (CVSS 8.8): Improper input validation in software for Intel(R) PROSet/Wireless Wi-Fi and Killer(TM) Wi-Fi in Windows 10 and 11 may…
CVE-2021-0066 — High (CVSS 8.4): Improper input validation in firmware for Intel(R) PROSet/Wireless Wi-Fi in multiple operating systems and Killer(TM)…
CVE-2022-21181 — High (CVSS 7.8): Improper input validation for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged…
CVE-2021-37409 — High (CVSS 7.8): Improper access control for some Intel(R) PROSet/Wireless WiFi and Killer(TM) WiFi products may allow a privileged user…
CVE-2021-0164 — High (CVSS 7.8): Improper access control in firmware for Intel(R) PROSet/Wireless Wi-Fi in multiple operating systems and Killer(TM)…

All CVEs affecting Intel Killer Ac 1550 Firmware →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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