How severe is CVE-2021-33670?

CVE-2021-33670 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-33670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33670?

CVE-2021-33670 primarily affects Sap Netweaver Application Server Java. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33670?

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-2021-33670 published?

CVE-2021-33670 was published on 2021-07-14 and last updated on 2026-06-17.

CVE-2021-33670

CVE-2021-33670 is a high-severity vulnerability in Sap Netweaver Application Server Java with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sap Netweaver Application Server Java
Published: 2021-07-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-33670?: 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.
How severe is CVE-2021-33670?: CVE-2021-33670 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-33670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33670?: CVE-2021-33670 primarily affects Sap Netweaver Application Server Java. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33670?: 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-2021-33670 published?: CVE-2021-33670 was published on 2021-07-14 and last updated on 2026-06-17.

References

Affected products (7)

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

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