Wiz
Vulnerability DatabaseCVE-2025-66220

CVE-2025-66220: 
Envoy vulnerability analysis and mitigation

Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, Envoy’s mTLS certificate matcher for match_typed_subject_alt_names may incorrectly treat certificates containing an embedded null byte (\0) inside an OTHERNAME SAN value as valid matches.

Source: NVD

Related Envoy vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-62504HIGH7.5
  • EnvoyEnvoy
  • envoy
NoYesOct 16, 2025
CVE-2025-66220HIGH7.1
  • EnvoyEnvoy
  • ecs-service-connect-agent
NoYesDec 03, 2025
CVE-2025-62409MEDIUM6.6
  • EnvoyEnvoy
  • cpe:2.3:a:envoyproxy:envoy
NoYesOct 16, 2025
CVE-2025-64527MEDIUM6.5
  • EnvoyEnvoy
  • envoy
NoYesDec 03, 2025
CVE-2025-64763MEDIUM5.3
  • EnvoyEnvoy
  • github.com/envoyproxy/envoy
NoYesDec 03, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo