CVE-2026-77190— Security Advisory 0177
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.
On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpected
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I. Basic Information for CVE-2026-77190
Vulnerability Information
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Vulnerability Title
Security Advisory 0177
Source: CVE Program / CVE List V5
Vulnerability Description
On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpectedly. The Pimsm agent is automatically restarted, but repeated attacks can cause the agent to restart continuously, resulting in a sustained denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Arista Networks | EOS | 4.36.0F ~ 4.36.1F | - |
|
II. Public POCs for CVE-2026-77190
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-77190 (1)
-
Security Advisory 0177 - Arista vendor-advisory
Same Patch Batch · Arista Networks · 2026-09-16 · 23 CVEs total
| CVE-2026-73453 | 10.0 CRITICAL | Security Advisory 0174 |
| CVE-2026-86106 | 9.6 CRITICAL | Security Advisory 0179 |
| CVE-2026-73447 | 9.1 CRITICAL | Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request |
| CVE-2026-73464 | 8.8 HIGH | Security Advisory 0166 |
| CVE-2026-73435 | 8.2 HIGH | Security Advisory 0171 |
| CVE-2026-73454 | 8.1 HIGH | Security Advisory 0165 |
| CVE-2026-86108 | 8.0 HIGH | Security Advisory 0181 |
| CVE-2026-73461 | 8.0 HIGH | Security Advisory 0163 |
| CVE-2026-73439 | 7.5 HIGH | Security Advisory 0164 |
| CVE-2026-73455 | 7.5 HIGH | Security Advisory 0173 |
| CVE-2026-2380 | 7.4 HIGH | Security Advisory 0168 |
| CVE-2026-73450 | 6.9 MEDIUM | Security Advisory 0161 |
| CVE-2026-86109 | 6.6 MEDIUM | Security Advisory 0182 |
| CVE-2026-73468 | 6.5 MEDIUM | Security Advisory 0175 |
| CVE-2026-73436 | 6.5 MEDIUM | Security Advisory 0171 |
| CVE-2026-86107 | 5.9 MEDIUM | Security Advisory 0180 |
| CVE-2026-73469 | 5.8 MEDIUM | Security Advisory 0176 |
| CVE-2026-73438 | 5.3 MEDIUM | Security Advisory 0172 |
| CVE-2026-73463 | 5.3 MEDIUM | Security Advisory 0169 |
| CVE-2026-73445 | 4.9 MEDIUM | Security Advisory 0167 |
Showing top 20 of 23 CVEs. View all on vendor page → →
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V. Comments for CVE-2026-77190
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