CVE-2021-28494 json
In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, authentication…
published 2021-09-09 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-15170
- cvss
- 9.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, authentication is bypassed by unprivileged users who are accessing the Web UI. This issue affects: Arista Metamako Operating System MOS-0.34.0 and prior releases
Exploit prediction
0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Arista Metamako Operating System
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
arista.com
/en/support/advisories-notices/security-advisories/12916-security-advisory-68
mitigation, vendor-advisory
Sources
- CVE List CVE-2021-28494
- NVD CVE-2021-28494
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