What is CVE-2021-21492?

CVE-2021-21492 is a medium-severity vulnerability in SAP Netweaver Application Server Java, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2021-04-13.

How severe is CVE-2021-21492?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in SAP Netweaver Application Server Java

CVE-2021-21492

SAP NetWeaver Application Server Java(HTTP Service), versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, does not sufficiently validate logon group in URLs, resulting in a content spoofing vulnerability when directory listing is enabled.

Published 2021-04-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (44.6th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

SAP Netweaver Application Server Java — versions 7.10, 7.11, 7.20
SAP Se Netweaver As For Java (HTTP Service) — versions < 7.10, < 7.11, < 7.20

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

wiki.scn.sap.com/wiki/pages/viewpage.action (Vendor Advisory)
launchpad.support.sap.com/ (Permissions Required)

Frequently asked questions

What is CVE-2021-21492?: CVE-2021-21492 is a medium-severity vulnerability in SAP Netweaver Application Server Java, classified under Authentication Bypass by Spoofing. CVSS score: 4.3/10. Published 2021-04-13.
How severe is CVE-2021-21492?: Medium severity. CVSS v3 base score is 4.3 out of 10.