CVE-2026-75944— A race condition during supplicant re-authentication may leave a stale ACL entry that persists in the system. If the AclAgent subsequently restarts, this stale entry may be applied to new supplicants, resulting in incorrect access control enforcement. User
Quick assessment
Affected
Arista Networks EOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 supplicant（认证客户端）重新认证过程中，竞态条件可能导致系统中残留一个过时的 ACL（访问控制列表）条目。如果 AclAgent（访问控制代理）随后发生重启，这个过时的条目可能会被应用到新的 supplicant 上，从而导致访问控制执行错误。要使这种非预期行为生效，需要用户交互（即管理员手动重启 AclAgent）。
Possible ATT&CK Techniques 1 AI
T1601 · Modify System Image
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I. Basic Information for CVE-2026-75944
Vulnerability Information
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Vulnerability Title
A race condition during supplicant re-authentication may leave a stale ACL entry that persists in the system. If the AclAgent subsequently restarts, this stale entry may be applied to new supplicants, resulting in incorrect access control enforcement. User
Source: CVE Program / CVE List V5
Vulnerability Description
A race condition during supplicant re-authentication may leave a stale ACL entry that persists in the system. If the AclAgent subsequently restarts, this stale entry may be applied to new supplicants, resulting in incorrect access control enforcement. User interaction (an AclAgent restart by an administrator) is required for the unintended behavior to take effect.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
清理环节不完整
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Arista Networks | EOS | 4.36.0 ~ 4.36.1F | - |
|
II. Public POCs for CVE-2026-75944
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-75944 (1)
Same Patch Batch · Arista Networks · 2026-09-14 · 5 CVEs total
| CVE-2026-73449 | 5.9 MEDIUM | On affected platforms running Arista EOS with both 802.1X port authentication and the RADI |
| CVE-2026-75943 | 2.6 LOW | A brief (milliseconds to seconds) traffic leak may occur when an authenticated supplicant |
| CVE-2026-77191 | 2.6 LOW | All of the CVEs covered in this advisory apply to affected platforms running Arista EOS wi |
| CVE-2026-75945 | 2.6 LOW | A race condition may cause a supplicant to remain in an authorized state after a clear dot |
IV. Related Vulnerabilities
Same product: EOS
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CVE-2026-75945
A race condition may cause a supplicant to remain in an auth -
CVE-2026-75943
A brief (milliseconds to seconds) traffic leak may occur whe -
CVE-2026-77191
All of the CVEs covered in this advisory apply to affected p -
CVE-2026-73449
On affected platforms running Arista EOS with both 802.1X po -
CVE-2026-2379
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A race condition may cause a supplicant to remain in an auth -
CVE-2026-75943
A brief (milliseconds to seconds) traffic leak may occur whe -
CVE-2026-77191
All of the CVEs covered in this advisory apply to affected p -
CVE-2026-73449
On affected platforms running Arista EOS with both 802.1X po -
CVE-2026-17191
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V. Comments for CVE-2026-75944
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