How severe is CVE-2021-21484?

CVE-2021-21484 has a CVSS 3.x base score of 9.8, 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 high.

Is CVE-2021-21484 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21484?

CVE-2021-21484 affects Sap Hana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21484?

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-2021-21484 published?

CVE-2021-21484 was published on 2021-03-09 and last updated on 2026-06-17.

CVE-2021-21484

CVE-2021-21484 is a critical-severity vulnerability in Sap Hana with a CVSS 3.x base score of 9.8. 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-863.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Sap Hana
Published: 2021-03-09
Last modified: 2026-06-17

Description

LDAP authentication in SAP HANA Database version 2.0 can be bypassed if the attached LDAP directory server is configured to enable unauthenticated bind.

Frequently asked questions

What is CVE-2021-21484?: LDAP authentication in SAP HANA Database version 2.0 can be bypassed if the attached LDAP directory server is configured to enable unauthenticated bind.
How severe is CVE-2021-21484?: CVE-2021-21484 has a CVSS 3.x base score of 9.8, 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 high.
Is CVE-2021-21484 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21484?: CVE-2021-21484 affects Sap Hana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21484?: 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-2021-21484 published?: CVE-2021-21484 was published on 2021-03-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sap:hana:2.0:*:*:*:*:*:*:*

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