What is CVE-2020-35177?

CVE-2020-35177 is a medium-severity vulnerability in Hashicorp Vault, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2020-12-17.

How severe is CVE-2020-35177?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Hashicorp Vault

CVE-2020-35177

HashiCorp Vault and Vault Enterprise 1.4.1 and newer allowed the enumeration of users via the LDAP auth method. Fixed in 1.5.6 and 1.6.1.

Published 2020-12-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.5th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

Hashicorp Vault

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

github.com/hashicorp/vault/blob/master/CHANGELOG.md (Release Notes)
discuss.hashicorp.com/t/hcsec-2020-25-vault-s-ldap-auth-method-allows-user-enum… (Vendor Advisory)

Frequently asked questions

What is CVE-2020-35177?: CVE-2020-35177 is a medium-severity vulnerability in Hashicorp Vault, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 5.3/10. Published 2020-12-17.
How severe is CVE-2020-35177?: Medium severity. CVSS v3 base score is 5.3 out of 10.