How severe is CVE-2021-27668?

CVE-2021-27668 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-27668 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27668?

CVE-2021-27668 affects Hashicorp Vault. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27668?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27668 published?

CVE-2021-27668 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-27668

CVE-2021-27668 is a medium-severity vulnerability in Hashicorp Vault with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Hashicorp Vault
Published: 2021-08-31
Last modified: 2026-06-17

Description

HashiCorp Vault Enterprise 0.9.2 through 1.6.2 allowed the read of license metadata from DR secondaries without authentication. Fixed in 1.6.3.

Frequently asked questions

What is CVE-2021-27668?: HashiCorp Vault Enterprise 0.9.2 through 1.6.2 allowed the read of license metadata from DR secondaries without authentication. Fixed in 1.6.3.
How severe is CVE-2021-27668?: CVE-2021-27668 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-27668 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27668?: CVE-2021-27668 affects Hashicorp Vault. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27668?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27668 published?: CVE-2021-27668 was published on 2021-08-31 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*

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