HOMEVULNERABILITIESCVE-2022-21654
CRITICAL

CVE-2022-21654

CWE-295Published: February 22, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2022-21654 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

envoyproxy1 product(s)
envoy
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/envoyproxy/envoy/commit/e9f936d85dc1edc34fabd0a1725ec180f2316353
PATCHhttps://github.com/envoyproxy/envoy/commit/e9f936d85dc1edc34fabd0a1725ec180f2316353
ADVISORYhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-5j4x-g36v-m283
ADVISORYhttps://github.com/envoyproxy/envoy/security/advisories/GHSA-5j4x-g36v-m283

All References (4)

→
https://github.com/envoyproxy/envoy/commit/e9f936d85dc1edc34fabd0a1725ec180f2316353Patch · Third Party Advisory
→
https://github.com/envoyproxy/envoy/security/advisories/GHSA-5j4x-g36v-m283Issue Tracking · Third Party Advisory
→
https://github.com/envoyproxy/envoy/commit/e9f936d85dc1edc34fabd0a1725ec180f2316353Patch · Third Party Advisory
→
https://github.com/envoyproxy/envoy/security/advisories/GHSA-5j4x-g36v-m283Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2022-21654
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-295
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 22, 2022

Related CVEs (CWE-295)

CVE-2026-4370
10.0
CVE-2025-32878
9.8
CVE-2024-56521
9.8
CVE-2025-6433
9.8
CVE-2025-36041
9.8
CVE-2025-29331
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-21654 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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