How severe is CVE-2021-21481?

CVE-2021-21481 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21481 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21481?

CVE-2021-21481 primarily affects Sap Netweaver. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21481?

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

When was CVE-2021-21481 published?

CVE-2021-21481 was published on 2021-03-09 and last updated on 2026-06-17.

CVE-2021-21481

CVE-2021-21481 is a high-severity vulnerability in Sap Netweaver with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Sap Netweaver
Published: 2021-03-09
Last modified: 2026-06-17

Description

The MigrationService, which is part of SAP NetWeaver versions 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not perform an authorization check. This might allow an unauthorized attacker to access configuration objects, including such that grant administrative privileges. This could result in complete compromise of system confidentiality, integrity, and availability.

Frequently asked questions

What is CVE-2021-21481?: The MigrationService, which is part of SAP NetWeaver versions 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not perform an authorization check. This might allow an unauthorized attacker to access configuration objects, including such that grant administrative privileges. This could result in complete compromise of system confidentiality, integrity, and availability.
How severe is CVE-2021-21481?: CVE-2021-21481 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21481 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21481?: CVE-2021-21481 primarily affects Sap Netweaver. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21481?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21481 published?: CVE-2021-21481 was published on 2021-03-09 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:sap:netweaver:7.10:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.11:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.20:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.30:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.31:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.40:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver:7.50:*:*:*:*:*:*:*

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Other CWE-863 (Incorrect Authorization) vulnerabilities

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Browse all CWE-863 (Incorrect Authorization) vulnerabilities →