CVE-2020-24586

lowpriority · track · 16EPSS 0.058 · 93 %ileDEEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
5.76% (93rd) EPSS
CVSS 2.9 · low
Is it mine?
128 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedCisco Aironet Access Point Softwarecisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedCisco Aironet Access Point Software (IOS XE Controller)cisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedCisco Business Wireless Access Point Softwarecisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedCisco IP Phones with Multiplatform Firmwarecisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedCisco TelePresence Endpoint Software (TC/CE)cisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedCisco Webex Room Phonecisco_csaf

    Cisco has released software updates that address this vulnerability.

    https://software.cisco.com
  • FixedTropOScisa_csaf_ot

    Disable the Wi-Fi access on any TropOS unit where local Wi-Fi access is not required. This is achieved by NOT enabling (or disabling) the local access SSID.

  • MitigationTropOScisa_csaf_ot

    As the FragAttacks vulnerability is targeted at an end-user device and generally involves redirection to fraudulent websites, the installation of comprehensive firewall capabilities on company end-user devices and servers will significantly reduce the likelihood of negative outcomes.

  • MitigationGT25-WLANcisa_csaf_ot

    After writing the required package data to the GOT, refer to the “How to check the versions in use” and check the fixed versions.

02

cvss

Technical severity, 0–10. One row per scoring source.

5.7
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.9–5.7

v2.02.9lowAV:A/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 5.5 · impact 2.9
v3.13.5lowCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2.1 · impact 1.4
v3.03.5lowCVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · CISA US
v3.13.5lowAV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.13.2lowCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
v3.15.7mediumCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:Nsecondary · Cisco PSIRT US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-212USCWE-74US
04

affected products (128)

Products and version ranges known to be affected.

showing 20 of 128
05

advisories (4)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2022-2069IEEE 802.11 (WLAN): Mehrere SchwachstellenDeutsch2021-05-11csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in der IEEE 802.11 Spezifikation und zahlreichen Implementierungen ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Netzwerkverkehr zu manipulieren und um Informationen offenzulegen.

  • cisco-sa-wifi-faf-22epcEWuMultiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 20212021-05-11csaf · cisco_csafUS

    On May 11, 2021, the research paper Fragment and Forge: Breaking Wi-Fi Through Frame Aggregation and Fragmentation was made public. This paper discusses 12 vulnerabilities in the 802.11 standard. One vulnerability is in the frame aggregation functionality, two vulnerabilities are in the frame fragmentation functionality, and the other nine are implementation vulnerabilities. These vulnerabilities could allow an attacker to forge encrypted frames, which could in turn enable the exfiltration of sensitive data from a targeted device. This advisory will be updated as additional information becomes available.

  • ICSA-21-236-01Hitachi ABB Power Grids TropOS2021-08-24icsa · cisa_csaf_otUS

    Successful exploitation of these vulnerabilities could allow an attacker to direct a client that is connected to a TropOS Wi-Fi access point to fake websites and extract sensitive data.

  • ICSA-22-102-04Mitsubishi Electric GT25-WLAN2022-04-12icsa · cisa_csaf_otUS

    There are multiple vulnerabilities due to design flaws in the frame fragmentation functionality and the frame aggregation functionality in the Wireless Communication Standards IEEE 802.11. These vulnerabilities could allow an attacker to steal communication contents or inject unauthorized packets.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundcisco_csafcisa_csaf_otNVDCVE.orgMITRE
published 2021-05-11modified 2026-06-17
08

references (58)

External citations — patches, advisories, analysis.

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