Listen to this Post
CVE-2026-17181 is a path traversal vulnerability affecting IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. This security flaw, rooted in the improper limitation of a pathname to a restricted directory (CWE-22), allows a remote, unauthenticated attacker to write files to arbitrary locations on the system.
The vulnerability exists because the software does not adequately validate user-supplied input that is used in file system operations. An attacker can exploit this by crafting a request that contains path traversal sequences, such as `../` (dot-dot-slash), to escape the intended directory. Because the vulnerability requires no authentication, it can be exploited over the network without any user interaction, making it highly accessible to malicious actors.
IBM has rated this vulnerability with a CVSS v3 base score of 8.2 (High). The NIST NVD, however, has assigned a score of 7.5 (High). The high severity stems from the fact that successful exploitation can lead to a complete loss of file integrity, as the attacker can write arbitrary content to any location on the file system. This could be used to overwrite critical system files, configuration data, or even place malicious files that could lead to further compromise.
The Db2 Mirror for i product is designed to synchronize two IBM i systems for high availability. Its management GUI operates with high system privileges. Consequently, a successful path traversal attack could allow an attacker to manipulate the system at a deep level, potentially disrupting the mirroring process itself and compromising the high-availability setup.
This vulnerability is part of a larger set of 18 flaws patched by IBM in August 2026. While no public proof-of-concept exploit code has been observed, the risk is considered critical, and administrators are urged to apply the available fixes immediately.
DailyCVE Form:
Platform: IBM Db2 Mirror for i
Version: 7.4, 7.5, 7.6
Vulnerability: Path Traversal (CWE-22)
Severity: High (CVSS 8.2)
Date: August 14, 2026
Prediction: Patch already released
What Undercode Say:
Analytics indicate that exploiting this path traversal vulnerability involves crafting specific HTTP requests. The following bash commands and code snippets demonstrate the principles behind such an attack for educational purposes.
Example curl command simulating a path traversal attempt curl -X POST "https://target-ibm-db2-mirror.com/api/file" \ -d "filename=../../../../etc/passwd" \ -d "content=malicious_content"
Python snippet illustrating a path traversal payload
import requests
url = "https://target-ibm-db2-mirror.com/api/write"
payload = {
"file_path": "../../../config/important.cfg",
"data": "evil_config_data"
}
response = requests.post(url, data=payload)
Exploit: (Educational Purposes!)
To exploit CVE-2026-17181, an attacker would identify an endpoint that accepts a file path as input without proper sanitization. By injecting path traversal sequences, the attacker can navigate outside the intended directory. For example, a request to write a file might use a parameter like filename=../../../../sensitive/file.txt. The vulnerable application would then write the attacker-supplied content to this arbitrary location, potentially overwriting critical system files or placing a web shell for further access.
Protection:
The primary protection against CVE-2026-17181 is to apply the security patches (PTFs) provided by IBM. The specific fixes are:
– SJ10947 for version 7.4
– SJ10961 for version 7.5
– SJ10948 for version 7.6
In addition to patching, organizations should implement strict input validation and sanitization for all user-supplied file paths. Employing a whitelist of allowed directories and characters, and using secure coding practices to canonicalize paths before use, can prevent such traversal attacks.
Impact:
A successful exploit of CVE-2026-17181 allows a remote attacker to write files to arbitrary locations on the system. This can lead to:
– Data Tampering: Overwriting or corrupting sensitive configuration and system files.
– System Compromise: Placing malicious files that could be executed, leading to further system takeover.
– Denial of Service: Disrupting the Db2 Mirror for i high-availability synchronization, which is critical for failover operations.
– Business Disruption: For organizations in sectors like finance and retail that rely on this high-availability feature, an attack could cause significant operational downtime and data loss.
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
