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Vulnerability record · CVE-2020-24588 · published 11 May 2021

CVE-2020-24588: Ieee 802.11 broken cryptographic algorithm vulnerability

Ieee · Ieee 802.11

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

3.5 CVSS 3.1 Low EPSS 3.6% · top 10.9% CWE-327 · Broken cryptographic algorithm
3.5CVSS 3.1 base score, v2 2.9
3.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
150Affected product versions listed by NVD
22References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets.

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

Affected products

150 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2021/05/11/12 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Third Party Advisory
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird 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-22epcEWu Third Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 Third Party Advisory
https://www.fragattacks.com ExploitThird Party Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.html Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/05/11/12 Mailing ListThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Third Party Advisory
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html Mailing ListThird 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-22epcEWu Third Party Advisory
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 Third Party Advisory
https://www.fragattacks.com ExploitThird Party Advisory
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.html Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-019200.html
https://cert-portal.siemens.com/productcert/html/ssa-913875.html

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-24588), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.