IBM QRadar SIEM Out-of-Bounds Read Flaw Puts Versions 7.5 and 7.6 at Risk

IBM QRadar SIEM deployments running versions 7.5.0 through 7.5.0 Update Package 16 Interim Fix 001, as well as versions 7.6.0.0 through 7.6.0.4, are vulnerable to a remote out-of-bounds read flaw. According to the National Vulnerability Database record for CVE-2026-93442, this issue has been assigned a CVSS score of 8.2, which classifies it as high severity. Security teams must determine if their current installations fall within these specific version ranges to assess their immediate exposure risk.

In plain English

An out-of-bounds read occurs when software attempts to access memory locations outside the intended range. In this case, the flaw in IBM QRadar SIEM allows a remote attacker to exploit this memory access error. According to the NVD description, this exploitation can result in two primary outcomes: a denial of service that disrupts system availability, or the unauthorized retrieval of sensitive information stored in memory. The vulnerability does not require local access, meaning attackers can trigger it from outside the immediate network perimeter.

The background

The National Vulnerability Database lists CVE-2026-93442 as the identifier for this specific weakness. The record maps the issue to CWE-125, which is the standard classification for out-of-bounds read errors. The affected software is IBM QRadar SIEM, a security information and event management platform. The vulnerability spans multiple update cycles, affecting both the 7.5.0 and 7.6.0 major version branches. No specific disclosure date or researcher attribution is provided in the NVD record itself.

What changes now

Organizations using the affected versions of IBM QRadar SIEM face a confirmed risk of remote exploitation. Because the flaw allows for both service disruption and data leakage, the threat profile is significant. There is no mention in the source material of a patch, fix, or update being available to remediate this issue. Consequently, administrators cannot rely on a software update to close this gap immediately. They must evaluate their current configuration and network exposure to mitigate the risk while awaiting a vendor response.

Who needs to act first

Teams usually prioritize systems that are directly accessible from external networks or untrusted internal segments. Check whether your QRadar instances have public-facing interfaces or are exposed to other network zones with lower trust levels. Reduce exposure by restricting access to management ports and limiting inbound traffic to known, trusted sources.

Ensure that configuration backups are current and verified before making any network changes. Monitor logs for unusual connection attempts or memory-related errors that might indicate exploitation attempts. Coordinate with network operations to implement temporary access controls that limit potential attack vectors while a permanent solution is pending.

What to do and how to stay safe: IBM QRadar SIEM

• Verify the exact version of IBM QRadar SIEM running in your environment to confirm if it falls within the affected ranges.
• Restrict network access to QRadar management interfaces to only authorized administrative hosts and IP addresses.
• Monitor system logs and performance metrics for signs of denial of service or unusual memory access patterns.
• Prepare to apply a vendor update immediately once IBM releases a patch for CVE-2026-93442.

Step-by-step guide: 7 Configuration Errors That Expose Systems to Zero-Day Exploits

General security guidance from the Vuln Post newsroom. It is not confirmed advice from the organisations named in this story.

Frequently asked questions

Which IBM QRadar SIEM versions are affected by CVE-2026-93442?

Versions 7.5.0 through 7.5.0 Update Package 16 Interim Fix 001 and versions 7.6.0.0 through 7.6.0.4 are affected.

What is the severity of this vulnerability?

The National Vulnerability Database rates it as high severity with a CVSS score of 8.2.

Is there a patch available for this flaw?

No fix has been confirmed yet according to the provided source material.