CVE-2021-3282Network attack vector

Cluster disruption via unauthenticated Raft peer removal

Published Feb 1, 2021 · Updated Aug 3, 2024

Improper authentication in HashiCorp Vault Enterprise 1.6.0 and 1.6.1 allows remote attackers to remove Raft peers from DR secondaries. The Raft remove-peer update path invoked handleRaftRemovePeerUpdate without the DR operation-token verifier, so an unauthenticated request reached the peer-removal handler. Exposure requires Enterprise replication with integrated storage and a DR secondary; the final node cannot be removed, but removing other peers interrupts cluster availability.

CVSS severity7.5
High
EPSS probability1.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in HashiCorp Vault Enterprise 1.6.0 and 1.6.1 allows remote attackers to remove Raft peers from DR secondaries. The Raft remove-peer update path invoked handleRaftRemovePeerUpdate without the DR operation-token verifier, so an unauthenticated request reached the peer-removal handler. Exposure requires Enterprise replication with integrated storage and a DR secondary; the final node cannot be removed, but removing other peers interrupts cluster availability.

The record

CVE
CVE-2021-3282
Published
Feb 1, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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