Security Advisory 0216

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-120976
StatePUBLISHED
AssignerArista
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-10 20:18:52 UTC
Updated2026-11-10 20:18:52 UTC
DescriptionOn affected platforms running Arista EOS with IEEE 802.1X authentication and MACsec using dynamically derived keys, sensitive authentication information may be recorded in diagnostic data during a Smart Switch Upgrade (SSU). An attacker with administrative access on the device who obtains the affected diagnostic data could recover sensitive authentication information. This could potentially compromise the confidentiality and integrity of traffic protected by MACsec on the affected link. The vulnerability is only exposed during and after an SSU reload where an active 802.1X session used for MACsec is present.

Risk And Classification

Primary CVSS: v4.0 7 HIGH from [email protected]

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-532 | CWE-532 CWE-532 Insertion of Sensitive Information into Log File

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary7HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED7HIGHCVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
3.1[email protected]Secondary6MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED6MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS v4.0 Breakdown

Attack Vector
Local
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
High
Integrity
High
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Arista Networks EOS affected 4.22.0F 4.32.0F custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series
CNA Arista Networks EOS affected 4.32.0F 4.33.0F custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series
CNA Arista Networks EOS affected 4.33.0F 4.33.9M custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series
CNA Arista Networks EOS affected 4.34.0F 4.34.8M custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series
CNA Arista Networks EOS affected 4.35.0F 4.35.6M custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series
CNA Arista Networks EOS affected 4.36.0F 4.36.2F custom 7388-8D Series, 7500R/R2 Series, 7800/R3/R3A Series, 722XPM and 720XPM Series, 750X Series, 7050X3/X4 Series, 7170 Series, 7289R3 Series, 7500R3 Series, 7800R4 Series

References

ReferenceSourceLinkTags
www.arista.com/en/support/advisories-notices/security-advisory/25038-securit... [email protected] www.arista.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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