HOMEVULNERABILITIESCVE-2021-37218
HIGH

CVE-2021-37218

CWE-295Published: September 7, 2021· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

HashiCorp Nomad and Nomad Enterprise Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.0.10 and 1.1.4.

NVD Source

Technical Analysis

CVE-2021-37218 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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 8.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

hashicorp1 product(s)
nomad
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

ADVISORYhttps://discuss.hashicorp.com/t/hcsec-2021-21-nomad-raft-rpc-privilege-escalation/29023
ADVISORYhttps://www.hashicorp.com/blog/category/nomad
ADVISORYhttps://discuss.hashicorp.com/t/hcsec-2021-21-nomad-raft-rpc-privilege-escalation/29023
ADVISORYhttps://www.hashicorp.com/blog/category/nomad

All References (4)

→
https://discuss.hashicorp.com/t/hcsec-2021-21-nomad-raft-rpc-privilege-escalation/29023Vendor Advisory
→
https://www.hashicorp.com/blog/category/nomadProduct · Vendor Advisory
→
https://discuss.hashicorp.com/t/hcsec-2021-21-nomad-raft-rpc-privilege-escalation/29023Vendor Advisory
→
https://www.hashicorp.com/blog/category/nomadProduct · Vendor Advisory

Quick Facts

CVE IDCVE-2021-37218
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-295
CISA KEVNo
Affected1 vendor(s)
PublishedSep 7, 2021

Related CVEs (CWE-295)

CVE-2026-4370
10.0
CVE-2017-17301
9.8
CVE-2022-21654
9.8
CVE-2018-11747
9.8
CVE-2015-7826
9.8
CVE-2018-21029
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-37218 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.
← All Vulnerabilities·Search for CVE-2021-37218·NVD