CVE-2021-28501: arista networks terminattr Improper Authorization
CVSS: 9.1v3.1CriticalModified
Published 14-01-2022Last modified 17-09-2024
Vulnerability summary
CVE-2021-28501 is a critical (CVSS 9.1) Improper Authorization vulnerability in arista networks terminattr. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)EPSS score
0.84%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 14-01-2022PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
An issue has recently been discovered in Arista EOS where the incorrect use of EOS's AAA API’s by the OpenConfig and TerminAttr agents could result in unrestricted access to the device for local users with nopassword configuration.
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:HSources2 sources · 7.8–9.1
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
Medium 6.9Preferred score · NVD (NIST)
AV:L/AC:M/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.84%
Chance of exploitation in the next 30 days
Percentile
57%
Versus all other CVEs
30-day change
0.00 pp
From 0.84% on 18-09-2026
18-09-202618-10-2026
EPSS score0.84%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (arista.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Arista1 product
- terminattr≤ 1.16.2
Arista networks1 product
- terminattr1.16.2 0
2 vendors · 2 products
References
1 links- www.arista.com/en/support/advisories-notices/security-advisories/13449-security-advisory-0071X Refsource MISCExploitMitigationPatchVendor Advisory