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Vulnerability · Published Sep 8, 2026 · Assigned by sap

CVE-2026-66767Memory Corruption vulnerability in SAP NetWeaver Application Server for ABAP and ABAP Platform

High 7.7

In plain English

A high-severity security flaw in SAP NetWeaver Application Server for ABAP and ABAP Platform from SAP_SE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High
Exploit odds (30 days)0.4%top 62.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

SAP NetWeaver Application Server for ABAP and ABAP Platform allows an unauthenticated user to send a specially crafted packet that triggers reprocessing of a previously buffered user request, potentially hijacking another user's session under narrow timing conditions. Successful exploitation could result in high impact on confidentiality and integrity, with low impact on availability of the application.

Affected products (as reported)

VendorProductVersions
SAP_SE SAP NetWeaver Application Server for ABAP and ABAP Platform KRNL64NUC 7.227.22EXTKRNL64UC 7.227.538.04KERNEL 7.227.547.77

Weakness: CWE-191 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

References