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CVE Record

CVE-2020-24587: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privac...

The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue is in the Wi-Fi standard behavior around fragmented wireless frames, not a single application. A nearby attacker may be able to decrypt selected fragments in specific conditions involving fragmented traffic and key renewal. There is no KEV listing or provided evidence of active exploitation.

Executive priority

Treat this as a fleet hygiene and wireless infrastructure update priority, not an internet-wide emergency. Focus on identifying exposed Wi-Fi assets, applying vendor updates, and replacing unsupported devices.

Technical view

CVE-2020-24587, part of the FragAttacks disclosures, concerns 802.11 not requiring all fragments of a frame to use the same encryption key. The source states this can allow selected fragment decryption when another device sends fragmented frames and WEP, CCMP, or GCMP keys are periodically renewed.

Likely exposure

Exposure is most relevant to Wi-Fi access points, controllers, clients, drivers, firmware, and Linux systems covered by vendor advisories. The bundle does not provide a complete affected-product list, so organizations should map their wireless estate against vendor guidance.

Exploitation context

Sources describe a wireless protocol-level weakness requiring conditions around fragmented frames and key renewal. The bundle does not cite public active exploitation, and CISA KEV is false. Practical risk depends on vendor implementation, deployed updates, and local wireless proximity.

Researcher notes

Evidence is strongest for the standards-level behavior and named vendor advisories. The bundle lacks CVSS, CWE, and a complete affected-product list. Avoid broad product claims unless confirmed in each vendor bulletin.

Mitigation direction

  • Inventory wireless infrastructure, clients, drivers, firmware, and Linux systems.
  • Review Cisco, Intel, Arista, Debian, and other vendor advisories.
  • Apply vendor-supplied firmware, driver, kernel, or software updates where available.
  • Prioritize managed Wi-Fi infrastructure and high-density office networks.
  • Retire unsupported wireless devices that cannot receive security updates.

Validation and detection

  • Map deployed wireless products to vendor advisory affected-version tables.
  • Verify installed AP, controller, client driver, firmware, and kernel versions.
  • Confirm security updates from relevant 2021 and later advisories are applied.
  • Check asset inventory for unsupported Wi-Fi devices or stale firmware.
  • Document any devices awaiting vendor guidance or replacement.
Prepared
Confidence
medium
Sources
9

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-24587 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
9Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.