HOMEVULNERABILITIESCVE-2021-3586
CRITICAL

CVE-2021-3586

CWE-1188Published: August 22, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A flaw was found in servicemesh-operator. The NetworkPolicy resources installed for Maistra do not properly specify which ports may be accessed, allowing access to all ports on these resources from any pod. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

NVD Source

Technical Analysis

CVE-2021-3586 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

Red Hat2 product(s)
openshift service meshservicemesh-operator
Source: NVD CPE · 2 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

ADVISORYhttps://access.redhat.com/security/cve/CVE-2021-3586
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1967738
ADVISORYhttps://access.redhat.com/security/cve/CVE-2021-3586
ADVISORYhttps://bugzilla.redhat.com/show_bug.cgi?id=1967738

All References (4)

→
https://access.redhat.com/security/cve/CVE-2021-3586Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1967738Issue Tracking · Vendor Advisory
→
https://access.redhat.com/security/cve/CVE-2021-3586Vendor Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1967738Issue Tracking · Vendor Advisory

Quick Facts

CVE IDCVE-2021-3586
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-1188
CISA KEVNo
Affected1 vendor(s)
PublishedAug 22, 2022

Related CVEs (CWE-1188)

CVE-2017-7964
10.0
CVE-2025-41672
10.0
CVE-2024-2912
10.0
CVE-2026-31957
10.0
CVE-2022-48342
9.8
CVE-2021-38759
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-3586 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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