SAP patches four CVSS 10.0 flaws, including unauthenticated RCE
The November fixes cover NetWeaver ICM, Web Dispatcher, Gateway, and SAML, and none require user interaction.
Incorrect authorization via SAP Gateway default ACL
SAP Gateway enables a default access control list that grants high privileges and treats an external caller as an internal application server. An unauthenticated attacker with network access to the Gateway can use this weakness to perform unauthorized actions in the application environment, with high impact on confidentiality, integrity, and availability. SAP has not listed affected builds.
What to do: Apply SAP's update for CVE-2026-89103. SAP has not named a fixed version or workaround.
| Product | Affected |
|---|---|
| SAP Gateway | — |
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
SAP Gateway activates the default Access Control List with high privileges allowing categorization of external attacker as internal application server. As a result an unauthenticated attacker with network access to the SAP Gateway could exploit this weakness to potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.
The November fixes cover NetWeaver ICM, Web Dispatcher, Gateway, and SAML, and none require user interaction.
Onapsis found no exploitation; network attackers can run commands as the SAP installation owner, <sid>adm.
Onapsis gave SAP a working unauthenticated exploit for ICM2SHELL; the November notes also cover ProxyGate and a SAML impersonation bug.
Onapsis names the memory-corruption bugs ICM2SHELL and the Gateway pre-auth issue PROXYGATE; attacks on these four are not reported.
The bulletin lists 35 new notes and does not report active exploitation of the patched issues.
Unauthenticated memory corruption in ICM and Web Dispatcher may allow code execution; exploitation is not discussed.
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