CVE-2021-32923Network attack vector

Dynamic-secret persistence via zero-TTL renewal misclassification

Published Jun 3, 2021 · Updated Aug 3, 2024

Lease flaw in HashiCorp Vault products before 1.5.9, 1.6.0 through 1.6.4, and 1.7.0 through 1.7.1 allows remote authenticated users to retain secrets. Renewal logic rounds a lease's remaining maximum lifetime below one second down to zero, which subsequent processing misclassifies as non-expiring. An existing Vault token and precisely timed renewal are required; affected dynamic credentials remain valid in underlying services after Vault should revoke them.

CVSS severity7.4
High
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Lease flaw in HashiCorp Vault products before 1.5.9, 1.6.0 through 1.6.4, and 1.7.0 through 1.7.1 allows remote authenticated users to retain secrets. Renewal logic rounds a lease's remaining maximum lifetime below one second down to zero, which subsequent processing misclassifies as non-expiring. An existing Vault token and precisely timed renewal are required; affected dynamic credentials remain valid in underlying services after Vault should revoke them.

The record

CVE
CVE-2021-32923
Published
Jun 3, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-613, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:N
7.4NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
T1078Valid Accounts

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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