CVE-2026-8402: SYSGUARD 6001 SQL Injection Vulnerability

CVE-2026-8402 Overview

CVE-2026-8402 is a Blind SQL Injection vulnerability in Eksagate Electronic Engineering and Computer Industry Trade Inc. SYSGUARD 6001. The flaw stems from improper neutralization of special elements used in an SQL command [CWE-89]. Attackers can exploit the vulnerability remotely without authentication or user interaction. The vendor confirmed the product is no longer supported, meaning no official patch will be released.

Critical Impact
Unauthenticated network attackers can extract, modify, or destroy database contents in SYSGUARD 6001 through blind SQL injection, with no vendor patch available.

Affected Products

Eksagate SYSGUARD 6001 from version 2.0.2 before 6.1.16.0
Product status: End-of-life, unsupported by vendor
No vendor-supplied fix planned

Discovery Timeline

2026-06-30 - CVE-2026-8402 published to the National Vulnerability Database (NVD)
2026-06-30 - Last updated in NVD database
2026-07-02 - EPSS scoring data published

Technical Details for CVE-2026-8402

Vulnerability Analysis

SYSGUARD 6001 fails to neutralize special characters passed into SQL statements. Attacker-controlled input reaches the database query layer without parameterization or sanitization. Because the application does not return SQL error messages directly, the vulnerability presents as blind SQL injection. Attackers infer results through boolean-based or time-based inference techniques.

The affected versions span from 2.0.2 up to but not including 6.1.16.0. The vendor confirmed the product is not supported, so users cannot rely on an official update. This significantly increases operational risk for any organization still running SYSGUARD 6001 in production environments.

Root Cause

The root cause is improper input neutralization in SQL statement construction [CWE-89]. User-supplied input is concatenated into SQL queries rather than bound as parameters. This design flaw allows attackers to alter query logic by injecting SQL syntax through request parameters.

Attack Vector

The attack vector is network-based. An unauthenticated remote attacker sends crafted HTTP requests containing SQL payloads to vulnerable SYSGUARD 6001 endpoints. Successful exploitation compromises confidentiality, integrity, and availability of backend database records. Attackers can enumerate schemas, extract credentials, or manipulate stored data.

See the Siber Güvenlik Notification #TR-26-0467 advisory for the vendor coordination details.

Detection Methods for CVE-2026-8402

Indicators of Compromise

HTTP requests containing SQL metacharacters such as ', --, UNION SELECT, SLEEP(, or BENCHMARK( targeting SYSGUARD 6001 endpoints
Unusually long response times consistent with time-based blind SQL injection probes
Repeated requests to the same parameter with incremental boolean payloads (e.g., AND 1=1, AND 1=2)
Outbound database connections or query volumes exceeding normal application baselines

Detection Strategies

Deploy web application firewall (WAF) rules that flag SQL injection payload patterns in requests to SYSGUARD 6001 URLs
Enable verbose database query logging and correlate anomalous query structures with application access logs
Monitor for authentication bypass attempts and unauthorized data reads from application service accounts

Monitoring Recommendations

Baseline normal query patterns and alert on deviations, particularly time-delayed responses indicating blind SQLi inference
Forward application, WAF, and database telemetry to a centralized SIEM for correlation
Track failed and successful logins to accounts whose credentials may be stored in the SYSGUARD database

How to Mitigate CVE-2026-8402

Immediate Actions Required

Inventory all SYSGUARD 6001 deployments and confirm versions between 2.0.2 and 6.1.16.0
Isolate SYSGUARD 6001 systems from untrusted networks and restrict access to management interfaces
Plan migration away from SYSGUARD 6001 given the vendor's confirmation that the product is unsupported
Rotate credentials and secrets stored within or accessible to the SYSGUARD 6001 database

Patch Information

No vendor patch is available. Eksagate confirmed that SYSGUARD 6001 is not supported, and no security fix will be issued. Organizations must treat this as a permanent exposure until the product is decommissioned or replaced. Refer to the Siber Güvenlik Notification #TR-26-0467 for coordination details.

Workarounds

Place SYSGUARD 6001 behind a WAF configured with strict SQL injection signatures and anomaly scoring
Restrict access to the application using network segmentation, VPN, and source IP allowlisting
Apply least-privilege database permissions to the SYSGUARD service account to limit blast radius
Enable comprehensive query and access logging to support incident detection and forensic response

bash

# Example: restrict SYSGUARD 6001 access with iptables to trusted management subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP