Patch Analysis & Exploitation Timeline: Seven CVEs, Two Remediation Tracks, CISA's September 2, 2026 KEV Additions

Sourcing and Methodology

This analysis uses the CISA Known Exploited Vulnerabilities catalog as the primary source for identifying vulnerabilities added on September 2, 2026. The catalog provides the CVE identifier, vendor or project, affected product, vulnerability description, date added, required action, and remediation due date.

Additional vulnerability information, including weakness classifications, product details, and technical descriptions, was reviewed using corresponding vulnerability records and security references where available. The analysis compares the catalog addition date with the assigned remediation deadline to identify the remediation windows.

Where exploitation timing or patch availability data was unavailable, the limitation is explicitly stated rather than estimating an exploitation-gap value.

Introduction

On September 2, 2026, the Cybersecurity and Infrastructure Security Agency added seven vulnerabilities to its Known Exploited Vulnerabilities catalog. The additions affect products including Kestra OSS, JFrog Artifactory, SonicWall SMA1000 Appliances, Kludex Starlette, LiteLLM, Sangoma Switchvox, and other enterprise technologies.

The entries represent multiple vulnerability classes, including OS command injection, improper authentication, server-side request forgery, HTTP request/response smuggling, and SQL injection. The catalog assigns the vulnerabilities to two remediation deadlines: September 5, 2026, and September 16, 2026.

This report reviews the identified CVEs, their remediation timelines, vulnerability classifications, historical context, and practical considerations for vulnerability management teams.

Background and Context

The CISA Known Exploited Vulnerabilities catalog identifies security vulnerabilities that have evidence of active exploitation or meet CISA's criteria for inclusion. Federal Civilian Executive Branch agencies are required to remediate cataloged vulnerabilities according to the deadlines specified in the associated Binding Operational Directive, while private-sector organizations commonly use the catalog as a prioritization reference.

The September 2, 2026 additions span enterprise software, web applications, network appliances, and supporting application frameworks. Their inclusion indicates that organizations should review asset inventories, identify exposed instances, and apply the relevant vendor-provided mitigations or updates.

Gap Calculation Methodology

The remediation window is calculated as the calendar-day difference between the date a vulnerability is added to the CISA KEV catalog and the assigned remediation due date.

The calculation is represented as:

Remediation Window = Due Date − CISA KEV Date Added

Disclosure-to-patch and patch-to-exploitation gaps are reported only when reliable disclosure, patch-release, and exploitation timestamps are available. If the required timestamps are not available, the corresponding gap is marked as unavailable.

Historical Trend Comparison

CISA KEV additions frequently include vulnerabilities affecting a combination of enterprise applications, network appliances, software frameworks, and infrastructure components. The September 2, 2026 entries follow this broader pattern by covering multiple technology categories rather than a single product family.

Compared with datasets that provide detailed disclosure, patch-release, and exploitation timestamps, this collection is more suitable for analyzing remediation deadlines and vulnerability composition. A direct comparison of exploitation gaps should be performed only when the same timestamp fields and calculation rules are available across each reporting period.

MITRE ATT&CK Mapping

The vulnerabilities reviewed in this report primarily relate to weaknesses that may support unauthorized access, application compromise, command execution, request manipulation, or manipulation of backend resources.

Depending on the affected product and exploitation method, exploitation of these weaknesses may contribute to ATT&CK techniques involving exploitation of public-facing applications, command execution, valid accounts, or other post-compromise activity. Exact technique mapping should be validated against the exploit behavior, affected deployment model, and vendor advisory for each CVE.