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CVE-2020-26143

24
FAUCET Score

CVE-2020-26143 is a vulnerability in the ALFA Windows 10 driver for AWUS036ACH, affecting Wi-Fi implementations in products from Alfa, Arista, and Siemens. It allows an attacker on the same network to inject arbitrary data frames into protected Wi-Fi networks (WEP, WPA, WPA2, WPA3) by exploiting the acceptance of fragmented plaintext frames. With a CVSS score of 6.5 (Medium), this vulnerability requires adjacent network access and has a high impact on integrity, but no impact on confidentiality or availability. There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit or ExploitDB. Despite limited community discussion, the vulnerability has received media coverage due to its relation to the broader FragAttacks vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
1030.36.604CPE matchmatch criteria
cpe:2.3:o:alfa:awus036h_firmware:1030.36.604:*:*:*:*:windows_10:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:arista:c-75_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:arista:o-90_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:arista:c-65_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:arista:w-68_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.17%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0417 is in the 98th percentile among its peer group of 1,802 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-348.rt7.130.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-348.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt

Vendor Advisories (1)

redhatCVE-2020-26143Moderate

kernel: accepting fragmented plaintext frames in protected networks

May 11, 2021

References

cert-portal.siemens.com / productcert/html/ssa-019200.html
cert-portal.siemens.com / productcert/html/ssa-913875.html
cert-portal.siemens.com / productcert/pdf/ssa-913875.pdf
Third Party Advisory
github.com / vanhoefm/fragattacks/blob/master/SUMMARY.md
Third Party Advisory
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
Third Party Advisory
arista.com / en/support/advisories-notices/security-advisories/12602-security-advisory-63
Third Party Advisory
fragattacks.com
Third Party Advisory
openwall.com / lists/oss-security/2021/05/11/12
Mailing ListThird Party Advisory