What is CVE-2021-27610?

CVE-2021-27610 is a critical-severity vulnerability in SAP Netweaver Abap, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-06-16.

How severe is CVE-2021-27610?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in SAP Netweaver Abap

CVE-2021-27610

SAP NetWeaver ABAP Server and ABAP Platform, versions - 700, 701, 702, 731, 740, 750, 751, 752, 753, 754, 755, 804, does not create information about internal and external RFC user in consistent and distinguished format, which could lead to improper authentication and may be exploited by malicious users to obtain illegitimate access to the system.

Vulnerability class: Broken Authentication

Published 2021-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.7% 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

SAP Netweaver Abap — versions 700, 701, 702
SAP Netweaver Application Server Abap — versions 700, 701, 702
SAP Se Netweaver As Abap And Platform — versions < 700, < 701, < 702

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2021-27610?: CVE-2021-27610 is a critical-severity vulnerability in SAP Netweaver Abap, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-06-16.
How severe is CVE-2021-27610?: Critical severity. CVSS v3 base score is 9.8 out of 10.