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CVE-2020-26146

MEDIUM
5.3
CVSS Score
Published: May 11, 2021 at 07:39 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
68 products affected across 3 vendorsScalance W1750D FirmwareW 68 FirmwareScalance W700 Ieee 802.11n Firmware

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Severity
MEDIUM5.3
Exploit prediction
EPSS 6%
SSVC
No known exploit

Description

An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.

Affected

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

C 100 Firmware· Arista
95%
v < 11.0.0-36
Affected range stops below 11.0.0-36, so it looks safe — our inference, not a vendor statement
arista-c-100 (same device)
C 110 Firmware· Arista
95%
v < 11.0.0-36
Affected range stops below 11.0.0-36, so it looks safe — our inference, not a vendor statement
arista-c-110 (same device)
C 120 Firmware· Arista
95%
v < 11.0.0-36
Affected range stops below 11.0.0-36, so it looks safe — our inference, not a vendor statement
arista-c-120 (same device)
C 130 Firmware· Arista
95%
v < 11.0.0-36
Affected range stops below 11.0.0-36, so it looks safe — our inference, not a vendor statement
arista-c-130 (same device)
C 200 Firmware· Arista
95%
v < 11.0.0-36
Affected range stops below 11.0.0-36, so it looks safe — our inference, not a vendor statement
arista-c-200 (same device)
C 230 Firmware· Arista
95%
v < 10.0.1-31
Affected range stops below 10.0.1-31, so it looks safe — our inference, not a vendor statement
arista-c-230 (same device)
C 235 Firmware· Arista
95%
v < 10.0.1-31
Affected range stops below 10.0.1-31, so it looks safe — our inference, not a vendor statement
arista-c-235 (same device)
C 250 Firmware· Arista
95%
v < 10.0.1-31
Affected range stops below 10.0.1-31, so it looks safe — our inference, not a vendor statement
arista-c-250 (same device)
C 260 Firmware· Arista
95%
v < 10.0.1-31
Affected range stops below 10.0.1-31, so it looks safe — our inference, not a vendor statement
arista-c-260 (same device)
C 65 Firmware· Arista
95%
All versions
arista-c-65 (same device)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMCISA-ADP
Attack Vector
ADJACENT_NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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