What is CVE-2020-6304?

CVE-2020-6304 is a high-severity vulnerability in SAP Netweaver Internet Communication Manager \(Kernel\), classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-01-14.

How severe is CVE-2020-6304?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in SAP Netweaver Internet Communication Manager \(Kernel\)

CVE-2020-6304

Improper input validation in SAP NetWeaver Internet Communication Manager (update provided in KRNL32NUC & KRNL32UC 7.21, 7.21EXT, 7.22, 7.22EXT KRNL64NUC & KRNL64UC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49 KERNEL 7.21, 7.49, 7.53) allows an attacker to prevent users from accessing its services through a denial of service.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-01-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.015 (73.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

SAP Netweaver Internet Communication Manager \(Kernel\) — versions 7.21, 7.22, 7.49
SAP Netweaver Internet Communication Manager \(Krnl32nuc\) — versions 7.21, 7.21ext, 7.22
SAP Netweaver Internet Communication Manager \(Krnl32uc\) — versions 7.21, 7.21ext, 7.22
SAP Netweaver Internet Communication Manager \(Krnl64nuc\) — versions 7.21, 7.21ext, 7.22
SAP Netweaver Internet Communication Manager \(Krnl64uc\) — versions 7.21, 7.21ext, 7.22
SAP Se Netweaver Internet Communication Manager (Kernel) — versions < 7.21, < 7.22, < 7.49
SAP Se Netweaver Internet Communication Manager (Krnl32nuc) — versions < 7.21, < 7.21EXT, < 7.22
SAP Se Netweaver Internet Communication Manager (Krnl32uc) — versions < 7.21, < 7.21EXT, < 7.22
SAP Se Netweaver Internet Communication Manager (Krnl64nuc) — versions < 7.21, < 7.21EXT, < 7.22
SAP Se Netweaver Internet Communication Manager (Krnl64uc) — versions < 7.21, < 7.21EXT, < 7.22

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2020-6304?: CVE-2020-6304 is a high-severity vulnerability in SAP Netweaver Internet Communication Manager \(Kernel\), classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-01-14.
How severe is CVE-2020-6304?: High severity. CVSS v3 base score is 7.5 out of 10.