Skip to main content
No exploitation reportedAwaiting NVD analysis

CVE-2026-120977

Security Advisory 0217

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-807

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-11-1020:09CVE publishedCNA

Versions per branch

Products declared by the CNA

As Arista, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Arista Networks EOSother versions: not affected

    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

    Affected
    • ≥ 4.31.2F, < 4.32.0Ffixed in 4.32.0Fcustom
    • ≥ 4.32.0F, < 4.33.0Ffixed in 4.33.0Fcustom
    • ≥ 4.33.0F, ≤ 4.33.9Mno fix statedcustom
    • ≥ 4.34.0F, ≤ 4.34.7Mno fix statedcustom
    • ≥ 4.35.0F, ≤ 4.35.5Mno fix statedcustom
    • ≥ 4.36.0F, ≤ 4.36.2Fno fix statedcustom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-120977 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-10
  • CNACVSS 4.07.12026-11-10
  • CNACVSS 3.18.22026-11-10
  • CNAweakness (CWE)CWE-8072026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
CVSS 4.0 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/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
Published
2026-11-10
Last Modified
2026-11-10
NVD status
Received

Frequently asked questions

What is CVE-2026-120977?

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.

Is CVE-2026-120977 actively exploited?

Active exploitation of CVE-2026-120977 has not been confirmed.

What is the CVSS score for CVE-2026-120977?

CVE-2026-120977 has a CVSS v3 base score of 8.2 (HIGH severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record