CVE-2021-28497: arista metamako_operating_system
Vulnerability summary
CVE-2021-28497 is a high (CVSS 7.8) vulnerability in arista metamako_operating_system. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 13% of scored vulnerabilities.
Timeline
- 09-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
In Arista's MOS (Metamako Operating System) software which is supported on the 7130 product line, under certain conditions, the bash shell might be accessible to unprivileged users in situations where they should not have access. This issue affects: Arista Metamako Operating System All releases in the MOS-0.1x train MOS-0.26.6 and below releases in the MOS-0.2x train MOS-0.31.1 and below releases in the MOS-0.3x train
CVSS metrics
3 scores · 2 sources · 2 versions- CVE.orgCNA4.4MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:LDiffers
EPSS trend
Probability
0.23%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
0.00 pp
From 0.23% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Arista1 product
- metamako_operating_system≥ MOS-0.26.7, < MOS-0.16.7 | ≥ MOS-0.32.0, < MOS-0.32.0 | ≤ 0.26.6 | ≥ 0.31.0, < 0.32.0
1 vendor · 1 product
References
1 links- www.arista.com/en/support/advisories-notices/security-advisories/12913-security-advisory-65X Refsource MISCMitigationVendor Advisory