Overview
Every quarter, security researchers and threat hunters face a growing wave of newly disclosed vulnerabilities and the exploits that weaponize them. The first quarter of 2026 proved no exception: exploit kits used by threat actors expanded their arsenals, incorporating fresh exploits targeting Microsoft Office, Windows, and Linux platforms. This tutorial walks you through a structured method for analyzing vulnerability and exploitation data from Q1 2026. You’ll learn how to interpret CVE registration statistics, identify trends in critical vulnerabilities, and understand which older exploits continue to dominate the threat landscape. By the end, you’ll be equipped to apply the same analytical approach to future quarterly reports.
Prerequisites
- Basic understanding of Common Vulnerabilities and Exposures (CVE) and CVSS scoring (especially critical scores > 8.9).
- Familiarity with common exploit techniques like remote code execution (RCE) and directory traversal.
- Access to public CVE databases (e.g., cve.org) and threat intelligence feeds (optional but helpful).
- A spreadsheet or data visualization tool to plot monthly trends (optional).
Step-by-Step Instructions
1. Collect CVE Registration Data
Start by gathering the total number of CVEs published each month from January 2022 through March 2026. You can download this data from the CVE program’s official site or use curated lists from trusted sources. The goal is to observe the overall trend: during Q1 2026, the total volume of vulnerabilities continued its historical upward climb. Reports indicate that AI-assisted discovery tools are accelerating this growth, so expect the curve to steepen in future quarters.
2. Isolate Critical Vulnerabilities
Filter the dataset to only include vulnerabilities with a CVSS score greater than 8.9 (critical). Plot these monthly counts separately. In Q1 2026, the number of critical CVEs showed a slight decline compared to late 2025, but the underlying trend remains upward. Key drivers included high-profile issues like React2Shell, new exploit frameworks for mobile platforms, and secondary vulnerabilities uncovered during patch development. If this hypothesis holds, you should see a significant drop in critical CVEs during Q2 2026—similar to the pattern observed in 2025.
3. Gather Exploitation Statistics
Move from vulnerability registration to active exploitation. Use open-source threat intelligence feeds and your own telemetry (if available) to identify which CVEs were exploited in the wild during Q1 2026. Pay special attention to both veteran vulnerabilities (persistently exploited for years) and new ones that recently appeared in threat actor toolkits.
4. Analyze Veteran Exploits
Examine the list of older vulnerabilities that still account for the largest share of detections. In Q1 2026, these included:
- CVE-2018-0802 – Remote code execution (RCE) in Microsoft Equation Editor.
- CVE-2017-11882 – Another RCE in Equation Editor.
- CVE-2017-0199 – Microsoft Office / WordPad vulnerability enabling full system compromise.
- CVE-2023-38831 – Improper handling of objects within archives (e.g., ZIP files leading to RCE).
- CVE-2025-6218 – Relative path traversal during archive extraction, allowing arbitrary directory writes.
- CVE-2025-8088 – Directory traversal bypass using NTFS Alternate Data Streams during extraction.
These exploits remain prevalent because many organizations have not fully patched legacy systems or because the attack vectors (like malicious Office documents) are still effective.
5. Identify New Exploits
Among the newcomers, threat actors incorporated exploits for Microsoft Office and Windows OS components. Review your threat intelligence sources for any new CVEs that were actively exploited during Q1 2026. Cross-reference these with the critical vulnerability list from step 2 to see which high-severity issues were quickly weaponized.
6. Correlate with C2 Frameworks
Popular command-and-control (C2) frameworks often integrate the latest exploits. Check if any of the newly observed exploits are being bundled with frameworks like Cobalt Strike, Metasploit, or Brute Ratel. This correlation helps prioritize patching efforts: if a vulnerability is both critical and integrated into C2 toolkits, it poses an immediate risk.
Common Mistakes
- Ignoring Veteran Exploits: Many analysts focus solely on new CVEs, but the data shows that exploits from 2017–2025 still account for the majority of detections. Always include historical CVEs in your risk assessments.
- Overlooking CVSS Score Limitations: A vulnerability with a CVSS score below 9 may still be heavily exploited if the attack vector is simple (e.g., phishing with a malicious document). Use exploitation data, not just severity scores, to prioritize.
- Confusing Registration with Exploitation: Just because a CVE is registered does not mean it is actively exploited. Always confirm with telemetry or open-source reports before adding to your threat model.
- Neglecting AI-Driven Discovery Trends: The rise of AI agents for vulnerability discovery means the volume of new CVEs will continue to increase. Plan your patch management cycles accordingly and automate where possible.
- Assuming Patch Availability = Safety: Many organizations delay patching due to testing requirements. Threat actors actively scan for unpatched systems, so a known exploit can remain effective for months.
Summary
By following this step-by-step guide, you can systematically analyze quarterly vulnerability data like the Q1 2026 report. The key takeaway: while new exploits for Microsoft Office and Windows appear each quarter, older vulnerabilities (e.g., CVE-2017-11882, CVE-2023-38831) continue to dominate exploitation statistics. Use a dual approach—track both CVE registration trends and real-world exploitation data—to inform your patching priorities. Apply the same methodology in future quarters to stay ahead of evolving threats.