CVE-2021-28496

In Arista's EOS software affected releases, the shared secret profiles sensitive configuration might be leaked when displaying output over eAPI or other JSON outputs to authenticated users on the device.

MEDIUM

6.5

CVSS Score

Published: October 21, 2021 at 04:41 PM UTC

Updated: June 17, 2026 at 03:46 AM UTC

2 products affected across 2 vendorsEosArista EOS

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.4%

Description

On systems running Arista EOS and CloudEOS with the affected release version, when using shared secret profiles the password configured for use by BiDirectional Forwarding Detection (BFD) will be leaked when displaying output over eAPI or other JSON outputs to other authenticated users on the device. The affected EOS Versions are: all releases in 4.22.x train, 4.23.9 and below releases in the 4.23.x train, 4.24.7 and below releases in the 4.24.x train, 4.25.4 and below releases in the 4.25.x train, 4.26.1 and below releases in the 4.26.x train

Affected

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

Eos · Arista

95%

4.22 ≤ v ≤ 4.22.7m4.23 ≤ v < 4.23.104.24 ≤ v < 4.24.84.25 ≤ v < 4.25.54.26 ≤ v < 4.26.2

Affected range stops below 4.23.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.24.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.25.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.26.2, so it looks safe — our inference, not a vendor statement

Arista EOS · Arista Networks

60%

EOS-4.22 ≤ v ≤ EOS-4.22.12EOS-4.23 ≤ v < EOS-4.23.10EOS-4.24 ≤ v < EOS-4.24.8EOS-4.25 ≤ v < EOS-4.25.5EOS-4.26 ≤ v < EOS-4.26.2EOS-4.22 EOS-4.23 EOS-4.24 EOS-4.25 EOS-4.26

Affected range stops below EOS-4.23.10, so it looks safe — our inference, not a vendor statement

Affected range stops below EOS-4.24.8, so it looks safe — our inference, not a vendor statement

Affected range stops below EOS-4.25.5, so it looks safe — our inference, not a vendor statement

Affected range stops below EOS-4.26.2, 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

https://www.arista.com/en/support/advisories-notices/security-advisories/13243-security-advisory-0069

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.arista.com/en/support/advisories-notices/security-advisories/13243-security-advisory-0069

CVSS

6.5MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-311CWE-522

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