On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, a malicious supplicant may bypass authentication.
Published Jun 4, 2026
8.2
HIGHCVSS 4.0
EPSS 0.32%
Description
On affected platforms running Arista EOS with 802.1x authentication configured on the access/trunk ports, and routing enabled on the access VLAN of the ports, a malicious supplicant may be able to bypass the requirement to perform 802.1x authentication.
Affected products
-
- Version 4.24.0StatusaffectedConstraints<=4.24.11M
- Version 4.25.0StatusaffectedConstraints<=4.25.11M
- Version 4.26.0StatusaffectedConstraints<=4.26.11M
- Version 4.27.0StatusaffectedConstraints<=4.27.11M
- Version 4.28.0StatusaffectedConstraints<=4.28.8M
- Version 4.29.0StatusaffectedConstraints<=4.29.6M
- Version 4.30.0StatusaffectedConstraints<=4.30.4M
- Version 4.31.0StatusaffectedConstraints<=4.31.0F
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Arista Networks | EOS | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades
CVE-2023-5502 has been fixed in the following releases: * 4.32.0F and later releases in the 4.32.x train * 4.31.3M and later releases in the 4.31.x train * 4.30.5M and later releases in the 4.30.x train * 4.29.7M and later releases in the 4.29.x train
Note: Products 7280E and 7500E are EOL, and there are no released versions of EOS which fix the issue on those platforms.
Metrics
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/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
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Jun 5, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Jun-Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.32% (0.00317) | 22.46th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.32% (0.00317) | 23.22th | v5 (v2026.06.15) |
| Jun 5, 2026 | 0.03% (0.00030) | 8.94th | v4 (v2025.03.14) |
References (1)
Change history (0)
No recorded changes yet.