CVE-2021-28496

mediumpriority · track · 26OT risk · elevatedEPSS 0.004 · 37 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.43% (37th) EPSS

CVSS 4 · medium

Is it mine?

10 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

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

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.15.7mediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.7mediumCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · psirt@arista.comexploitability 2.1 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-522USprimaryCWE-311US

affected products (10)

Products and version ranges known to be affected.

Arista Networks Arista EOS≤ EOS-4.22 ≤EOS-4.22.12enisa_euvdEU
Arista Networks Arista EOSEOS-4.23 → EOS-4.23.10enisa_euvdEU
Arista Networks Arista EOSEOS-4.24 → EOS-4.24.8enisa_euvdEU
Arista Networks Arista EOSEOS-4.25 → EOS-4.25.5enisa_euvdEU
Arista Networks Arista EOSEOS-4.26 → EOS-4.26.2enisa_euvdEU
arista eos4.22 → 4.22.7mnvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
arista eos4.23 → 4.23.10nvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
arista eos4.24 → 4.24.8nvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
arista eos4.25 → 4.25.5nvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
arista eos4.26 → 4.26.2nvdUScpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-10-21modified 2026-06-17

related (1,722)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2021-40655US	high7.5OT critical	86.7% (100th)	KEV	2021-09-24
An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT. An attacker can obtain a user name and password by forging a post request to the / getcfg.php…
CVE-2021-30116US	critical9.8OT critical	85.7% (100th)	KEV	2021-07-09
Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the insta…
CVE-2021-22681US	critical9.8OT critical	63.6% (99th)	KEV	2021-03-03
Rockwell Automation Studio 5000 Logix Designer Versions 21 and later, and RSLogix 5000 Versions 16 through 20 use a key to verify Logix controllers are communicating with Rockwell…
CVE-2020-29583US	critical9.8OT critical	90.2% (100th)	KEV	2020-12-22
Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the fi…
CVE-2017-9248US	critical9.8OT critical	75.1% (100th)	KEV	2017-07-03
Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect Telerik.Web.UI.DialogParametersEncryptionK…

+1717 more

references (4)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan