How severe is CVE-2021-27603?

CVE-2021-27603 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-27603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27603?

CVE-2021-27603 primarily affects Sap Netweaver Application Server Abap. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-27603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27603 published?

CVE-2021-27603 was published on 2021-04-13 and last updated on 2026-06-17.

CVE-2021-27603

CVE-2021-27603 is a medium-severity vulnerability in Sap Netweaver Application Server Abap with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Sap Netweaver Application Server Abap
Published: 2021-04-13
Last modified: 2026-06-17

Description

An RFC enabled function module SPI_WAIT_MILLIS in SAP NetWeaver AS ABAP, versions - 731, 740, 750, allows to keep a work process busy for any length of time. An attacker could call this function module multiple times to block all work processes thereby causing Denial of Service and affecting the Availability of the SAP system.

Frequently asked questions

What is CVE-2021-27603?: An RFC enabled function module SPI_WAIT_MILLIS in SAP NetWeaver AS ABAP, versions - 731, 740, 750, allows to keep a work process busy for any length of time. An attacker could call this function module multiple times to block all work processes thereby causing Denial of Service and affecting the Availability of the SAP system.
How severe is CVE-2021-27603?: CVE-2021-27603 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-27603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27603?: CVE-2021-27603 primarily affects Sap Netweaver Application Server Abap. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-27603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27603 published?: CVE-2021-27603 was published on 2021-04-13 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:sap:netweaver_application_server_abap:731:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_application_server_abap:740:*:*:*:*:*:*:*
cpe:2.3:a:sap:netweaver_application_server_abap:750:*:*:*:*:*:*:*

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