How severe is CVE-2023-37491?

CVE-2023-37491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-37491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-37491?

CVE-2023-37491 primarily affects Sap Message Server. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-37491?

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-2023-37491 published?

CVE-2023-37491 was published on 2023-08-08 and last updated on 2026-06-17.

CVE-2023-37491

CVE-2023-37491 is a high-severity vulnerability in Sap Message Server 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. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Sap Message Server
Published: 2023-08-08
Last modified: 2026-06-17

Description

The ACL (Access Control List) of SAP Message Server - versions KERNEL 7.22, KERNEL 7.53, KERNEL 7.54, KERNEL 7.77, RNL64UC 7.22, RNL64UC 7.22EXT, RNL64UC 7.53, KRNL64NUC 7.22, KRNL64NUC 7.22EXT, can be bypassed in certain conditions, which may enable an authenticated malicious user to enter the network of the SAP systems served by the attacked SAP Message server. This may lead to unauthorized read and write of data as well as rendering the system unavailable.

Frequently asked questions

What is CVE-2023-37491?: The ACL (Access Control List) of SAP Message Server - versions KERNEL 7.22, KERNEL 7.53, KERNEL 7.54, KERNEL 7.77, RNL64UC 7.22, RNL64UC 7.22EXT, RNL64UC 7.53, KRNL64NUC 7.22, KRNL64NUC 7.22EXT, can be bypassed in certain conditions, which may enable an authenticated malicious user to enter the network of the SAP systems served by the attacked SAP Message server. This may lead to unauthorized read and write of data as well as rendering the system unavailable.
How severe is CVE-2023-37491?: CVE-2023-37491 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-37491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-37491?: CVE-2023-37491 primarily affects Sap Message Server. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-37491?: 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-2023-37491 published?: CVE-2023-37491 was published on 2023-08-08 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:a:sap:message_server:kernel_7.22:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:kernel_7.53:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:kernel_7.54:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:kernel_7.77:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:krnl64nuc_7.22:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:krnl64nuc_7.22ex:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:rnl64uc_7.22:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:rnl64uc_7.22ext:*:*:*:*:*:*:*
cpe:2.3:a:sap:message_server:rnl64uc_7.53:*:*:*:*:*:*:*

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