CVE-2026-120977

Security Advisory 0217

Published Nov 10, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed

Description

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.

Affected Products

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

Version	Status	Constraints
`4.31.2F`	affected	< 4.32.0F
`4.32.0F`	affected	< 4.33.0F
`4.33.0F`	affected	≤ 4.33.9M
`4.34.0F`	affected	≤ 4.34.7M
`4.35.0F`	affected	≤ 4.35.5M
`4.36.0F`	affected	≤ 4.36.2F

No data.

Vendor Product Versions

Arista

Eos

Version	Status	Scheme	Platform
`[4.31.2F,4.32.0F)`	affected	generic	['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']
`[4.32.0F,4.33.0F)`	affected	generic	['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']
`[4.33.0F,4.33.9M]`	affected	generic	['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']
`[4.34.0F,4.34.7M]`	affected	generic	['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']
`[4.35.0F,4.35.5M]`	affected	generic	['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']
`[4.36.0F,4.36.2F]`	affected	generic	['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']

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.161% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.arista.com/en/support/advisories-notices/security-advisory/25039-security-advisory-0217

History

Nov 12, 2026 3:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Arista Arista eos
Vendors & Products		Arista Arista eos

Nov 10, 2026 8:15 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		Security Advisory 0217
Weaknesses		CWE-807
References		https://www.arista.com/en/support/advisories-notices/security-advisory/25039-security-advisory-0217
Metrics		cvssV3_1 `{'score': 8.2, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N'}` cvssV4_0 `{'score': 7.1, 'vector': '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'}`