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CVE-2026-7473

On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic…

Medium Known exploited
Severity
6.9 / 10
Medium · CVSS 4.0
Exploit chance (EPSS)
1.11%
Chance of exploitation in the next 30 days. Higher than 65.87% of scored vulnerabilities.
Known exploited
Yes
In CISA's catalog since Jun 9, 2026
Weakness
CWE-1023 Incomplete Comparison with Missing Factors
Fix
None yet
No fixed version published
Exploited in the wild. Arista Extensible Operating System Incomplete Comparison with Missing Factors Vulnerability (Arista Extensible Operating System). Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Due for U.S. federal agencies by Jun 23, 2026.

Description

On affected platforms running Arista EOS where a tunnel decapsulation configuration—such as VXLAN (Virtual Extensible LAN), decap-groups, or a GRE (Generic Routing Encapsulation) tunnel interface—is present, the switch will incorrectly decapsulate and forward other unexpected tunneled packet with a destination IP matching its configured decapsulation IP. This occurs because the switch does not verify the tunnel protocol type, potentially leading to the unexpected processing of non-configured tunnel traffic.

This issue has been reported as being exploited in the wild.

How to fix

No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.

Severity breakdown

CVSS 4.0 6.9

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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

Attack vector
Network
Attack complexity
Low
Attack requirements
None
Privileges required
None
User interaction
None
Confidentiality (vulnerable system)
None
Integrity (vulnerable system)
Low
Availability (vulnerable system)
None
Confidentiality (subsequent systems)
None
Integrity (subsequent systems)
Low
Availability (subsequent systems)
None
Exploit maturity
Not defined
Scope
X

CVSS 3.1 5.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None

Weakness

CWE-1023: Incomplete Comparison with Missing Factors

The product performs a comparison between entities that must consider multiple factors or characteristics of each entity, but the comparison does not include one or more of these factors.

References

Advisories

Other links

Timeline

  1. Published
  2. Added to CISA's Known Exploited Vulnerabilities catalog
  3. Remediation due for U.S. federal agencies
  4. Last updated by the source
  5. Latest EPSS score
AdvisorySeverityWhy it's related
GHSA-gxg4-2rrr-jhc7
OpenClaw: Hostname checks could treat trailing-dot hosts inconsistently
Medium Same weakness, CWE-1023
GHSA-x5qj-865h-mgvm
Symfony: HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes
Medium Same weakness, CWE-1023
GHSA-77q5-rr5v-x43q
OpenClaw: Trusted retry endpoint checks could match hostname prefixes
Medium Same weakness, CWE-1023
GHSA-923m-gv2p-w5qp
Django: has_vary_header may expose cached responses when Vary values contain whitespace
Medium Same weakness, CWE-1023
GHSA-c65p-x677-fgj6
vLLM has a Weakness in MultiModalHasher Image Hashing Implementation
High Same weakness, CWE-1023
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