CVE-2021-33670

Name: CVE-2021-33670
Creator: NVD / NIST
Published: 2021-07-14T12:15:08.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.16%

Last modified Jun 17, 2026

CVE-2021-33670 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. SAP NetWeaver AS for Java (Http Service Monitoring Filter), versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker to send multiple HTTP requests with different method types thereby crashing the filter and making the HTTP server unavailable to other legitimate users leading to denial of service vulnerability.. EPSS estimates a 3.16% chance of exploitation in the next 30 days.

Description

SAP NetWeaver AS for Java (Http Service Monitoring Filter), versions - 7.10, 7.11, 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker to send multiple HTTP requests with different method types thereby crashing the filter and making the HTTP server unavailable to other legitimate users leading to denial of service vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

3.16%

86.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Sap	Netweaver Application Server Java	7.10
Sap	Netweaver Application Server Java	7.11
Sap	Netweaver Application Server Java	7.20
Sap	Netweaver Application Server Java	7.30
Sap	Netweaver Application Server Java	7.31
Sap	Netweaver Application Server Java	7.40
Sap	Netweaver Application Server Java	7.50

References

http://packetstormsecurity.com/files/166965/SAP-NetWeaver-Java-Denial-Of-Service.htmlPatch, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2022/May/4Mailing List, Patch, Third Party Advisory
https://launchpad.support.sap.com/#/notes/3056652Permissions Required
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506Vendor Advisory
http://packetstormsecurity.com/files/166965/SAP-NetWeaver-Java-Denial-Of-Service.htmlPatch, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2022/May/4Mailing List, Patch, Third Party Advisory
https://launchpad.support.sap.com/#/notes/3056652Permissions Required
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506Vendor Advisory

Timeline

Published: Jul 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33670?

How severe is CVE-2021-33670?

CVE-2021-33670 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33670?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33670?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST