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CVE-2021-28508

21
FAUCET Score

CVE-2021-28508 is an internally discovered vulnerability affecting Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols. Under specific conditions, TerminAttr can leak IPsec sensitive data in clear text to other authorized users within CVP, potentially allowing them to decrypt or modify IPsec traffic. This vulnerability has a CVSS score of 6.1 (Medium), indicating a network-based attack with high privileges required and user interaction, leading to high confidentiality and integrity impacts. There is no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.10.11CPE matchmatch criteria
cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
>= 1.11.0, < 1.16.8CPE matchmatch criteria
cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
>= 1.17.0, < 1.19.0CPE matchmatch criteria
cpe:2.3:a:arista:terminattr:*:*:*:*:*:*:*:*
>= 4.23, <= 4.23.11CPE matchmatch criteria
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*
>= 4.24, < 4.24.10CPE matchmatch criteria
cpe:2.3:o:arista:eos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 60th percentile among its peer group of 4,931 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

arista.com / en/support/advisories-notices/security-advisories/15484-security-advisory-0077
ExploitVendor Advisory