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PatchSiren cyber security CVE debrief

CVE-2026-27671 SAP_SE CVE debrief

A critical vulnerability, CVE-2026-27671, has been identified in the SAP Kernel used by the Application Server ABAP of SAP NetWeaver and ABAP Platform. This vulnerability allows an unauthenticated attacker to send a crafted RFC request that exploits logical errors in memory management, leading to memory corruption. This could have a high impact on the confidentiality, integrity, and availability of the application, with a CVSS score of 9.8.

Vendor
SAP_SE
Product
SAP NetWeaver AS ABAP and ABAP Platform
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-09
Original CVE updated
2026-06-09
Advisory published
2026-06-09
Advisory updated
2026-06-09

Who should care

Administrators and security teams responsible for SAP NetWeaver and ABAP Platform deployments should be aware of this vulnerability and take immediate action to mitigate the risk.

Technical summary

The vulnerability is caused by improper RFC protocol validation in the SAP Kernel. An unauthenticated attacker can exploit this vulnerability by sending a crafted RFC request, which can lead to memory corruption.

Defensive priority

High

Recommended defensive actions

  • Apply the necessary patches and updates as recommended by SAP.
  • Review and update RFC protocol validation in the SAP Kernel.
  • Monitor and restrict access to sensitive areas of the application.

Evidence notes

The CVE-2026-27671 vulnerability has been confirmed by SAP, and patches are available. For more information, refer to resourceLinkAnnotations [ref-4] and [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27671 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27671

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-27671 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27671

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.