---
title: "Understanding First Seen and Last Seen"
slug: "understanding-first-seen-and-last-seen"
updated: 2026-10-22T15:02:28Z
published: 2026-10-22T15:02:28Z
canonical: "docs.safe.security/understanding-first-seen-and-last-seen"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.safe.security/llms.txt
> Use this file to discover all available pages before exploring further.

# Understanding First Seen and Last Seen

![](https://cdn.document360.io/23dc20b8-a989-48c0-8653-f1d3e4abc734/Images/Documentation/image-7FM630G4.png)

Balbix displays two key timestamps for every vulnerability instance: **First Seen** and **Last Seen**. Understanding what these timestamps represent helps prioritize investigations and determine if remediation validation is needed.

### **First Seen**

This is the **earliest point in time** when Balbix detected or inferred the presence of the vulnerability on a specific asset. It is **set once** and does **not change**, even if the vulnerability continues to be present in future scans.

- **Purpose**: Indicates how long the vulnerability has existed in your environment.
- **Common use**: Useful for SLA tracking, aging analysis, and root cause investigations.

### **Last Seen**

This reflects the **most recent confirmation** that the vulnerability is still present on the asset. The source of confirmation determines how this timestamp is set:

- **Connector or Sensor**: Timestamp reflects the latest observation delivered from integrated tools (e.g., Qualys, Tenable, Rapid7).
- **Balbix Inference Engine**: Timestamp reflects the last point at which the conditions used by Balbix to infer the vulnerability were still observed to be true.

If a condition changes (e.g., a missing patch is applied or configuration is corrected), the vulnerability may no longer appear, and the Last Seen value will no longer update.

- **Purpose**: Indicates the **freshness of the vulnerability** data.
- **Common use**: Helps assess whether further validation or re-scanning is necessary.

### **Example**

If a vulnerability was **First Seen** on March 1 and **Last Seen** on July 28, it means:

- Balbix originally detected it on March 1.
- It was last confirmed as still present on July 28.

#### 

> ### See Also:
> 
> [Understanding Asset Timestamps](/balbixhelp/docs/understanding-time-stamps)