CVE-2026-23681 Overview
CVE-2026-23681 is an information disclosure vulnerability in the SAP Support Tools Plug-In (also distributed as SAP Solution Tools Plug-In). The flaw stems from a missing authorization check [CWE-862] in a function module. An authenticated attacker can invoke specific function modules to retrieve information about the target SAP system and its configuration. The disclosed data can support reconnaissance for subsequent attacks against the SAP landscape. The issue affects confidentiality only, with no impact on integrity or availability.
Critical Impact
Authenticated attackers with low privileges can enumerate system and configuration details from affected SAP instances, aiding follow-on attacks against business-critical applications.
Affected Products
- SAP Solution Tools Plug-In version 740
- SAP Solution Tools Plug-In version 758
- SAP Solution Tools Plug-In versions 2008_1_700 and 2008_1_710
Discovery Timeline
- 2026-02-10 - CVE-2026-23681 published to the National Vulnerability Database (NVD)
- 2026-02-17 - Last updated in NVD database
Technical Details for CVE-2026-23681
Vulnerability Analysis
The vulnerability resides in a Remote Function Call (RFC)-enabled function module shipped with the SAP Support Tools Plug-In. The module exposes system and configuration data but does not enforce an authorization check before returning results. An authenticated user with low privileges can call the function module directly and receive data they should not be entitled to view.
The disclosed information typically includes runtime parameters, component versions, and configuration metadata. This intelligence narrows the attack surface for follow-on activity such as targeted exploitation of known SAP vulnerabilities, abuse of weakly configured services, or lateral movement across the SAP landscape.
Root Cause
The root cause is a missing authorization check [CWE-862]. The function module performs its intended data-gathering logic without verifying that the caller holds the required authorization object or role. Any authenticated session that can reach the RFC interface satisfies the function's preconditions.
Attack Vector
Exploitation requires network reachability to the SAP application server and valid credentials for a low-privileged account. The attacker calls the affected function module through standard SAP RFC mechanisms, such as an RFC client, a transaction that invokes the module, or a script using the SAP NetWeaver RFC SDK. No user interaction is required. The vulnerability mechanism is described in the SAP Security Note 3680416.
Detection Methods for CVE-2026-23681
Indicators of Compromise
- Unexpected RFC calls to Support Tools Plug-In function modules from user accounts that do not normally perform administrative or support activities.
- Spikes in SM20 security audit log entries showing function module invocations tied to system information retrieval.
- Anomalous RFC traffic patterns originating from non-administrative service accounts or external networks.
Detection Strategies
- Enable and review the SAP Security Audit Log (SM19/SM20) for function module calls associated with the Support Tools Plug-In.
- Correlate RFC gateway logs with user role assignments to surface low-privileged accounts invoking support-tier function modules.
- Hunt for repeated reconnaissance-style calls returning configuration metadata to a single session or source IP.
Monitoring Recommendations
- Forward SAP audit logs and RFC gateway logs to a centralized SIEM for correlation against authentication and network telemetry.
- Baseline normal usage of Support Tools Plug-In function modules and alert on deviations by user, host, or frequency.
- Track patch state of the Support Tools Plug-In across the SAP landscape using SAP Solution Manager or equivalent inventory tooling.
How to Mitigate CVE-2026-23681
Immediate Actions Required
- Apply the SAP-supplied patch referenced in SAP Security Note 3680416 to all affected Solution Tools Plug-In versions.
- Review and tighten role assignments so that only authorized support personnel can invoke Support Tools Plug-In function modules.
- Restrict RFC access at the gateway using reginfo and secinfo access control lists to limit which clients can call sensitive modules.
Patch Information
SAP addressed CVE-2026-23681 through the security patch documented in SAP Security Note 3680416, released as part of the SAP Security Patch Day cycle. Administrators should apply the corrected Support Tools Plug-In support package to versions 740, 758, 2008_1_700, and 2008_1_710.
Workarounds
- Where immediate patching is not possible, remove or restrict authorization objects that grant access to the affected function modules for non-administrative users.
- Enforce RFC gateway ACLs (reginfo, secinfo) to deny untrusted external programs from registering or invoking RFC servers.
- Increase audit log retention and alerting around Support Tools Plug-In function modules until the patch is deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
