CVE-2021-28499: arista metamako_operating_system Credentials Management Errors
Vulnerability summary
CVE-2021-28499 is a medium (CVSS 6.3) Credentials Management Errors vulnerability in arista metamako_operating_system. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 9.7% 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, user account passwords set in clear text could leak to users without any password. This issue affects: Arista Metamako Operating System MOS-0.18 and post releases in the MOS-0.1x train All releases in the MOS-0.2x train MOS-0.31.1 and prior releases in the MOS-0.3x train
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% 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 cause- CWE-255Credentials Management ErrorsWeaknesses in this category are related to the management of credentials.
- CWE-522Insufficiently Protected CredentialsThe product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
Affected systems
Arista1 product
- metamako_operating_system≥ MOS-0.18, < MOS-0.18* | ≥ MOS-0.32.0, < MOS-0.32.0 | ≥ 0.10.0, ≤ 0.18.0 | ≥ 0.20.0, < 0.32.0
1 vendor · 1 product
References
1 links- www.arista.com/en/support/advisories-notices/security-advisories/12912-security-advisory-64X Refsource MISCMitigationVendor Advisory