Medium 6.5Published May 11, 2021

CVE-2020-26140An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H.

Updated under an hour ago (Oct 27, 2026, 12:00 PM ET)

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It affects Siemens SCALANCE W721-1 RJ45 and 59 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Siemens SCALANCE W721-1 RJ45

Exploited in the last 30 days

An issue was discovered in the ALFA Windows 10 driver 6.1316.1209 for AWUS036H. The WEP, WPA, WPA2, and WPA3 implementations accept plaintext frames in a protected Wi-Fi network. An adversary can abuse this to inject arbitrary data frames independent of the network configuration.

CVSS: 6.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Modified
Record last updated: Oct 8, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Siemens SCALANCE W721-1 RJ45 siemens:scalance_w721_1_rj45 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W722-1 RJ45 siemens:scalance_w722_1_rj45 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W734-1 RJ45 siemens:scalance_w734_1_rj45 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W734-1 RJ45 (USA) siemens:scalance_w734_1_rj45_usa (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W738-1 M12 siemens:scalance_w738_1_m12 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W748-1 M12 siemens:scalance_w748_1_m12 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W748-1 RJ45 siemens:scalance_w748_1_rj45 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W761-1 RJ45 siemens:scalance_w761_1_rj45 (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W774-1 M12 EEC siemens:scalance_w774_1_m12_eec (from the name)	before V6.6.0	CISA ADP
Siemens SCALANCE W774-1 RJ45 siemens:scalance_w774_1_rj45 (from the name)	before V6.6.0	CISA ADP
1–10 of 60

References

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu	vendor-advisory, x-refsource-cisco
https://www.fragattacks.com	x-refsource-misc
https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md	x-refsource-misc
http://www.openwall.com/lists/oss-security/2021/05/11/12	mailing-list, x-refsource-mlist
https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf	x-refsource-confirm
https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.