CVE-2026-73462— On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the I
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 with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP
Affected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Arista Networks | EOS | 4.36.0≤ 4.36.1F |
affected |
4.35.0≤ 4.35.5M |
affected | ||
4.34.0≤ 4.34.7.1M |
affected | ||
4.33.0≤ 4.33.8M |
affected |
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I. Basic Information for CVE-2026-73462
Vulnerability Information
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Vulnerability Title
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the I
Source: CVE Program / CVE List V5
Vulnerability Description
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.
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
跨界内存读
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-2026-73462
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-73462 (1)
-
Security Advisory 0159 - Arista vendor-advisory
Same Patch Batch · Arista Networks · 2026-09-16 · 28 CVEs total
| CVE-2026-73456 | 10.0 CRITICAL | Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request |
| 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-2026-73436 | 6.5 MEDIUM | Security Advisory 0171 |
| CVE-2026-73468 | 6.5 MEDIUM | Security Advisory 0175 |
| CVE-2026-77190 | 6.5 MEDIUM | Security Advisory 0177 |
| CVE-2026-86107 | 5.9 MEDIUM | Security Advisory 0180 |
| CVE-2026-73469 | 5.8 MEDIUM | Security Advisory 0176 |
| CVE-2026-73463 | 5.3 MEDIUM | Security Advisory 0169 |
Showing top 20 of 28 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: EOS
-
CVE-2026-73457
Under certain circumstances, the gNPSI client credentials mi -
CVE-2026-73456
Under certain circumstances, an unauthenticated gNPSI client -
CVE-2026-73442
On affected platforms running Arista EOS with VRRP enabled, -
CVE-2026-73443
On affected platforms running Arista EOS with VRRPv2 IP-AH a -
CVE-2026-77190
Security Advisory 0177
Same vendor: Arista Networks
-
CVE-2026-73457
Under certain circumstances, the gNPSI client credentials mi -
CVE-2026-73456
Under certain circumstances, an unauthenticated gNPSI client -
CVE-2026-73442
On affected platforms running Arista EOS with VRRP enabled, -
CVE-2026-73443
On affected platforms running Arista EOS with VRRPv2 IP-AH a -
CVE-2026-86107
Security Advisory 0180
Same weakness: CWE-125
-
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GPAC downloader.c wait_for_header_and_parse out-of-bounds -
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Out-of-bounds read (buffer over-read) vulnerability in HTTP -
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Netcore NR255-V 1.5.130703 Out-of-Bounds Read in filter_arp_ -
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Netcore NR255-V 1.5.130703 Out-of-Bounds Read in mtd_write F
V. Comments for CVE-2026-73462
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