How severe is CVE-2020-10661?

CVE-2020-10661 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-10661 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10661?

CVE-2020-10661 primarily affects Hashicorp Vault. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-10661?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-10661 published?

CVE-2020-10661 was published on 2020-03-23 and last updated on 2026-06-17.

CVE-2020-10661

CVE-2020-10661 is a critical-severity vulnerability in Hashicorp Vault with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Hashicorp Vault
Published: 2020-03-23
Last modified: 2026-06-17

Description

HashiCorp Vault and Vault Enterprise versions 0.11.0 through 1.3.3 may, under certain circumstances, have existing nested-path policies grant access to Namespaces created after-the-fact. Fixed in 1.3.4.

Frequently asked questions

What is CVE-2020-10661?: HashiCorp Vault and Vault Enterprise versions 0.11.0 through 1.3.3 may, under certain circumstances, have existing nested-path policies grant access to Namespaces created after-the-fact. Fixed in 1.3.4.
How severe is CVE-2020-10661?: CVE-2020-10661 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-10661 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10661?: CVE-2020-10661 primarily affects Hashicorp Vault. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-10661?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-10661 published?: CVE-2020-10661 was published on 2020-03-23 and last updated on 2026-06-17.

References

Affected products (2)

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

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