9.8

CVE-2022-21654: envoyproxy envoy Improper Certificate Validation

CVSS: 9.8v3.1CriticalModified
Published 22-02-2022Last modified 23-04-2025
Open JSON

Vulnerability summary

CVE-2022-21654 is a critical (CVSS 9.8) Improper Certificate Validation vulnerability in envoyproxy envoy. EPSS estimates a 1.08% chance of exploitation in the next 30 days, higher than 64.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.08%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
RHSA-2022:1275RHSA-2022:1276

Timeline

  1. 22-02-2022
    PublishedVulnerability first disclosed.
  2. 23-04-2025
    Last modifiedVulnerability information updated.

Description

Envoy is an open source edge and service proxy, designed for cloud-native applications. Envoy's tls allows re-use when some cert validation settings have changed from their default configuration. The only workaround for this issue is to ensure that default tls settings are used. Users are advised to upgrade.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.08%

Chance of exploitation in the next 30 days

Percentile

65%

Versus all other CVEs

30-day change

0.00 pp

From 1.08% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Envoyproxy1 product
  • envoy≥ 1.7.0, < 1.18.6 | ≥ 1.19.0, < 1.19.3 | ≥ 1.20.0, < 1.20.2 | ≥ 1.21.0, < 1.21.1

1 vendor · 1 product

References

2 links