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CVE-2020-26143

MEDIUM
6.5
CVSS Score
Published: May 11, 2021 at 07:36 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
32 products affected across 3 vendorsScalance W700 Ieee 802.11n FirmwareW 68 FirmwareC 65 Firmware

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Severity
MEDIUM6.5
Exploit prediction
EPSS 4%

Description

An issue was discovered in the ALFA Windows 10 driver 1030.36.604 for AWUS036ACH. The WEP, WPA, WPA2, and WPA3 implementations accept fragmented plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

AWUS036H Firmware· Alfa
95%
1030.36.604
alfa-awus036h (same device)
C 65 Firmware· Arista
95%
All versions
arista-c-65 (same device)
C 75 Firmware· Arista
95%
All versions
arista-c-75 (same device)
O 90 Firmware· Arista
95%
All versions
arista-o-90 (same device)
W 68 Firmware· Arista
95%
All versions
arista-w-68 (same device)
Scalance W700 Ieee 802.11n Firmware· Siemens
95%
All versions
siemens-scalance-w700-ieee-802-11n (same device)
Scalance W721-1 RJ45 Firmware· Siemens
60%
v < V6.6.0
Affected range stops below V6.6.0, so it looks safe — our inference, not a vendor statement
Scalance W722-1 RJ45 Firmware· Siemens
60%
v < V6.6.0
Affected range stops below V6.6.0, so it looks safe — our inference, not a vendor statement
Scalance W734-1 RJ45 Firmware· Siemens
60%
v < V6.6.0
Affected range stops below V6.6.0, so it looks safe — our inference, not a vendor statement
Scalance W738-1 M12 Firmware· Siemens
60%
v < V6.6.0
Affected range stops below V6.6.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (8)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2021/05/11/12
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md
Vendor Advisoryx_refsource_CISCOThird Party Advisory
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.fragattacks.com
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-019200.html
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-913875.html

CVSS

6.5MEDIUM[email protected]
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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