Security readout for executives and security teams
Plain-English summary
This issue can expose IPsec secrets through Arista’s telemetry path into CloudVision Portal. The main business risk is that an authorized CVP user could see sensitive IPsec data and potentially decrypt or alter protected traffic. It is not listed as KEV, and the bundle does not show public exploitation.
Executive priority
Treat this as a targeted infrastructure confidentiality risk, not a mass exploitation emergency. Prioritize environments where CVP users are numerous or IPsec protects sensitive traffic.
Technical view
CVE-2021-28508 affects Arista EOS state streaming telemetry agent TerminAttr and OpenConfig transport protocols. Under certain conditions, TerminAttr may leak IPsec sensitive data in clear text in CVP to other authorized users. Listed affected versions include EOS 4.23-4.27 and TerminAttr v1.10, v1.16, and v1.18.
Likely exposure
Exposure is most likely in Arista environments using affected EOS or TerminAttr versions with CVP telemetry enabled and IPsec configuration present.
Exploitation context
The CVSS vector requires network access, high privileges, and user interaction. Sources do not indicate active exploitation, and KEV status is false.
Researcher notes
The bundle does not include exact triggering conditions, fixed versions, or exploit evidence. Analysis should stay focused on version exposure, telemetry paths, CVP authorization boundaries, and whether IPsec-sensitive values were observable.
Mitigation direction
- Identify affected EOS and TerminAttr versions in Arista-managed environments.
- Review Arista advisory 0077 for vendor-approved fixed versions or mitigations.
- Restrict CVP access to users with a clear operational need.
- Review IPsec credential exposure risk and follow internal rotation procedures if needed.
Validation and detection
- Inventory Arista EOS 4.23 through 4.27 deployments.
- Check for TerminAttr v1.10, v1.16, or v1.18 installations.
- Confirm whether CVP receives telemetry from affected devices.
- Review CVP user roles and access logs for sensitive telemetry visibility.
- Compare installed versions against Arista advisory 0077.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-255: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-28508 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H0.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.arista.com/en/support/advisories-notices/security-advisories/15484-security-advisory-0077CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Credentials Management Errors
Credentials Management Errors represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.