CVE-2026-120977
Security Advisory 0217
On affected platforms running Arista EOS with 802.1X with Dynamic Host Configuration Protocol (DHCP) device profiling enabled, a network-adjacent attacker can send a crafted DHCP packet to force the device to record a spoofed device profile. This may potentially allow the authenticated supplicant to acquire unauthorized access to a network segment with elevated privileges.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| EOS Arista Networks Platforms: 710 Series, 720D Series, 720XP/722XPM Series, 750X Series, 7010TX Series, 7020R/R4 Series, 7260X/X3 Series, 7280R/R2/R3/R4 Series, 7050X3/X4 Series, 7060X/X2/X4/X5/X6/XE7 Series, 7300X/X3 Series, 7320X Series, 7358X4 Series, 7368X4 Series, 7388X5 Series, 7500R/R2/R3 Series, 7700R4 Series, 7800R3/R4 Series |
≥ 4.31.2F; < 4.32.0F (affected, custom) ≥ 4.32.0F; < 4.33.0F (affected, custom) ≥ 4.33.0F; ≤ 4.33.9M (affected, custom) ≥ 4.34.0F; ≤ 4.34.7M (affected, custom) ≥ 4.35.0F; ≤ 4.35.5M (affected, custom) ≥ 4.36.0F; ≤ 4.36.2F (affected, custom) Other versions: unaffected |
CNA: Arista |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.2 high |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N | CNA: Arista |
| 4.0 / 7.1 high |
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N | CNA: Arista |
| 4.0 / 7.1 high |
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/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 | NVD: [email protected] |
| 3.1 / 8.2 high |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.