CVE-2020-24586

Name: CVE-2020-24586
Creator: NVD / NIST
Published: 2021-05-11T20:15:08.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.5/10EPSS 5.76%

Last modified Jun 17, 2026

CVE-2020-24586 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.. EPSS estimates a 5.76% chance of exploitation in the next 30 days.

Description

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.

Metrics

CVSS 3.1

3.5/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS Probability

5.76%

92.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ieee	Ieee 802.11	All versions
Debian	Debian Linux	9.0
Linux	Mac80211	All versions
Arista	C-250 Firmware	< 10.0.1-31
Arista	C-260 Firmware	< 10.0.1-31
Arista	C-230 Firmware	< 10.0.1-31
Arista	C-235 Firmware	< 10.0.1-31
Arista	C-200 Firmware	< 11.0.0-36
Intel	Ax210 Firmware	< 22.30.0.11
Intel	Ax201 Firmware	< 22.30.0.11
Intel	Ax200 Firmware	< 22.30.0.11
Intel	Ac 9560 Firmware	< 22.30.0.11
Intel	Ac 9462 Firmware	< 22.30.0.11
Intel	Ac 9461 Firmware	< 22.30.0.11
Intel	Ac 9260 Firmware	< 22.30.0.11
Intel	Ac 8265 Firmware	< 20.70.21.2
Intel	Ac 8260 Firmware	< 20.70.21.2
Intel	Ac 3168 Firmware	< 19.51.33.1
Intel	Ac 7265 Firmware	< 19.51.33.1
Intel	Ac 3165 Firmware	< 19.51.33.1
Intel	Ax1675 Firmware	All versions
Intel	Ax1650 Firmware	All versions
Intel	Ac 1550 Firmware	All versions
Linux	Linux Kernel	>= 4.4, < 4.4.271
Linux	Linux Kernel	>= 4.9, < 4.9.271
Linux	Linux Kernel	>= 4.14, < 4.14.235
Linux	Linux Kernel	>= 4.19, < 4.19.193
Linux	Linux Kernel	>= 5.4, < 5.4.124
Linux	Linux Kernel	>= 5.10, < 5.10.42
Linux	Linux Kernel	>= 5.12, < 5.12.9

References

http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Third Party Advisory
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWuThird Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63Third Party Advisory
https://www.fragattacks.comExploit, Third Party Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/12Mailing List, Third Party Advisory
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.mdThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWuThird Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63Third Party Advisory
https://www.fragattacks.comExploit, Third Party Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.htmlThird Party Advisory

Timeline

Published: May 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24586?

How severe is CVE-2020-24586?

CVE-2020-24586 has a CVSS score of 3.5/10 (LOW severity). The EPSS model estimates a 5.76% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24586?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-24586?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST