CVE-2026-73467On affected platforms running Arista EOS, under certain circumstances plaintext shared secrets for configured Terminal Access Controller Access-Control System Plus (TACACS+) servers
- 6.0MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
On affected platforms running Arista EOS, under certain circumstances plaintext shared secrets for configured Terminal Access Controller Access-Control System Plus (TACACS+) servers
Timeline
ID reserved
By Arista
- 34 days later
· 34 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| AristaCNA (assigner) | 4.0 | Medium6.0 | CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H |
| AristaCNA (assigner) | 3.1 | Medium6.3 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 4.0 | Medium6.0 | CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.
Affected products
- affected 4.36.0 – ≤ 4.36.1F
- affected 4.35.0 – ≤ 4.35.4M
- affected 4.34.0 – ≤ 4.34.7M
- affected 0.0.0 – ≤ 4.33.9M
- affected ≤ 4.32.0
- affected ≤ 4.31.0
What to do
Solution: CVE-2026-73465 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train. * 4.35.5M and later releases in the 4.35.x train. * 4.34.8M and later releases in the 4.34.x train. * 4.33.10M and later releases in the 4.33.x train.
Workaround: The workaround is to disable Tacacs level 6 tracing on agent Aaa. switch(config)# no trace Aaa enable Tacacs levels 6 Clean Up Existing Log Files If any of the above agent logging levels have been enabled, it’s necessary to clean up the existing log files to remove the already leaked secrets and keys. Use the following commands to clean up Aaa or ConfigAgent log files: switch(config)# bash sudo truncate -s 0 /var/log/agents/Aaa* switch(config)# bash sudo truncate -s 0 /var/log/agents/ConfigAgent* Then use the following commands to clean up previously rotated old log files: switch(config)# bash sudo find /var/log/agents -name 'Aaa*.gz' -type f -delete switch(config)# bash sudo find /var/log/agents -name 'ConfigAgent*.gz' -type f -delete
References
References1
- Arista Security Advisory 0153 (opens in a new tab)vendor-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-79027 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-73467)Record last updated .