SAP Hit by 9.9 SQL Injection — ERP Security Lessons in 2026

What Is CVE-2026-27681? — A 9.9 SQL Injection Vulnerability

The vulnerability lies in the Business Planning and Consolidation (BPC) module — a budget planning and financial consolidation tool used by major enterprises worldwide — and the Business Warehouse (BW) module, which serves as the data warehouse of SAP systems.

How the vulnerability works:

1. The vulnerable ABAP program allows users to upload files for data import
2. Uploaded files can contain arbitrary SQL statements embedded in them
3. The program forwards SQL directly to the database without sufficient authorization checks
4. An attacker (with regular user privileges) can therefore instruct the database to read, modify, or delete any data

Onapsis — a security firm specializing in SAP — reported that SAP fixed the issue by "deactivating the executable code responsible for the vulnerable upload behavior". In other words, "turning off the running code" rather than fixing the logic — suggesting the feature will likely be rewritten in a future release.

Detail	Value
CVE ID	CVE-2026-27681
CVSS Score	9.9 / 10 (Critical)
Disclosure Date	April 8, 2026 (SAP Patch Tuesday)
Products	SAP BPC 10.1, 11.0 + SAP BW
Database	Microsoft SQL Server
Network	Exploitable over the network
User Interaction	Not required
SAP Note	3719353

SQL Injection in ERP — The Big Picture Every Organization Must Know

SQL Injection is not a new problem — OWASP has classified it as a Top Risk since 2003 — yet it continues to surface in world-class ERP systems:

Year	ERP System	CVE / Vulnerability	CVSS
2026	SAP BPC / BW	CVE-2026-27681	9.9
2026	Fortinet FortiClient EMS	CVE-2026-21643 (KEV)	9.1
2025	Oracle E-Business Suite	multiple	9.1+
2024	Microsoft Dynamics	multiple	8.1
2023	Workday	SQL injection report	7.5

The lesson: expensive ERP does not mean safer than mid-tier ERP — every system can have vulnerabilities. What matters most is discipline in patch management and proper authorization design.

A Simple SQL Injection Example

Consider an ERP that builds Queries using String Concatenation:

// WRONG — vulnerable to SQL Injection
String sql = "SELECT * FROM invoice WHERE customer_id = '" + userInput + "'";
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql);

// CORRECT — use Prepared Statement (parameterized query)
String sql = "SELECT * FROM invoice WHERE customer_id = ?";
PreparedStatement stmt = conn.prepareStatement(sql);
stmt.setString(1, userInput);
ResultSet rs = stmt.executeQuery();

In the case of SAP CVE-2026-27681, the issue is not in the Query itself but in the file upload + ABAP code that reads SQL from a file and executes it without checking authorization — a fundamentally flawed design from the start.

Impact on Thai Organizations Using SAP

Many large Thai organizations — public companies, banks, and state enterprises — use SAP as their primary ERP. The potential impacts span multiple levels:

Risk	Possible Impact
Stolen Financial Reports	Attackers could read parent and subsidiary Consolidation Reports before public market disclosure
Modified Forecast / Budget	Tampering with budget planning data → affecting executive decision-making
Data Deletion	Destroying audit trails → violating Thai Accounting Act / SOX / SET regulations
Compliance Violation	PDPA, ISO 27001, and SOC 2 status may be immediately questioned
Reputation	Stock prices may be impacted as soon as the market becomes aware

Mitigation — What Every IT Team Must Do Today

1. Patch Immediately — install SAP Note 3719353 within 24-72 hours per organizational policy
2. Audit Log Review — search for unusual upload activity going back at least 90 days
3. Authorization Review — reduce privileges of users who should not have upload rights
4. Enable 2FA for every admin user
5. Network Segmentation — isolate SAP from general networks; restrict access to VPN/Bastion only
6. Security Awareness — alert Finance/Accounting teams to reject suspicious upload requests

How Saeree ERP Defends Against SQL Injection

Saeree ERP is built on Security by Design from the ground up, using the same approaches that successfully defend against SAP-style vulnerabilities:

Measure	Details
Prepared Statement	Every Query uses parameterized queries — no string concatenation anywhere
ORM Layer	Java + Hibernate prevents SQL Injection at the framework level
Input Validation	Data type, length, and encoding validated before reaching business logic
Authorization Matrix	Permissions checked on every request at both API and Service layer
Audit Log	Every data modification logged with user, IP, and timestamp
2FA	Mandatory for admin / approver / financial roles
SSL A+ Rating	Highest-grade communication encryption (TLS 1.3)
On-premise Option	Deploy in your own data center — separate attack surface from the public internet

Summary — Lessons from CVE-2026-27681

Lesson	What to Do
World-Class ERPs Still Get SQL Injection	Don't assume "SAP / Oracle = safe" — every system needs Patch Management
Authorization Matters More Than Authentication	A logged-in user is not entitled to do anything — every action must be authorization-checked
Patch Tuesday Is the Minimum Discipline	Set clear SLAs: Critical patches must deploy within 72 hours
Choose Transparent Vendors	SAP discloses CVE + Notes per standard practice — vendors that hide vulnerabilities are far more concerning
Defense in Depth	Application security + Network + Authorization + Audit must all be in place together

"A 9.9 score in SAP doesn't mean SAP is bad — it means every ERP needs disciplined Patch Management and rigorous Authorization Design. Security is not a feature checkbox; it's a continuous process."

- Saeree ERP Team

If your organization is looking for an ERP designed on Security by Design principles — with support for GFMIS, Buddhist Era fiscal years, Thai tax compliance, and a dedicated Thai team — contact the Saeree ERP team for a consultation.

References

• NVD — CVE-2026-27681 Detail
• The Hacker News — April Patch Tuesday Fixes Critical Flaws
• ZeroBot — SAP April 2026 Patch Day Tackles 9.9 ABAP SQL Injection
• CCB Belgium — Critical SQL Injection Vulnerability in SAP Products
• SAP Expert — Urgent: Patch CVE-2026-27681 in SAP BPC (Note 3719353)