# CVE-2026-8037 — Progress Software LoadMaster **CISA KEV** > As of 2026-10-01, CVE-2026-8037 is a CRITICAL-severity vulnerability in Progress Software LoadMaster, CVSS v3.1 9.6, EPSS 77.3% (99.5th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-07), with a US federal remediation deadline of 2026-08-10. Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2026-8037, most recently “CVE-2026-8037: Pre-Authentication Remote Code Execution in Progress Kemp LoadMaster via escape_quotes() Heap Out-of-Bounds Read”. **Last updated:** 2026-10-01 ## What is CVE-2026-8037? OS Command Injection Remote Code Execution Vulnerability in API in Progress ADC Products allows an un-authenticated attacker to execute arbitrary commands on the LoadMaster appliance by exploiting unsanitized input in multiple command endpoints The record classifies CVE-2026-8037 under weakness class [CWE-77](https://intel.threadlinqs.com/cwe/CWE-77). Its CVSS v3 base vector states that the flaw is reachable from an adjacent network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 128 days ago. ## Severity and exploitation probability - **CVSS v3.1 base score:** 9.6 — CRITICAL (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`) - **EPSS (FIRST):** 77.3% probability of exploitation in the next 30 days, higher than 99.5% of all scored CVEs - **CISA KEV:** Listed since 2026-08-07, federal remediation deadline 2026-08-10 - **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9 - **Published:** 2026-06-04, last modified 2026-10-01 ## Is CVE-2026-8037 being exploited? CISA added CVE-2026-8037 to the Known Exploited Vulnerabilities catalog on 2026-08-07, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-08-10 under BOD 22-01. Weaponised exploit code for CVE-2026-8037 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. A ProjectDiscovery Nuclei detection template exists (`http/cves/2026/CVE-2026-8037.yaml`). It currently carries a trending score of 60 in the Threadlinqs vulnerability feed. - [HORKimhab/CVE-2026-8037](https://github.com/HORKimhab/CVE-2026-8037) (github) - [Caster-chen/CVE-2026-8037-POC](https://github.com/Caster-chen/CVE-2026-8037-POC) (github) - [trickest/cve](https://github.com/trickest/cve/blob/main/2026/CVE-2026-8037.md) (trickest) ## Affected products and versions - [Progress Software](https://intel.threadlinqs.com/vendors/progress-software): LoadMaster, ECS Connections Manager, Object Scale Connection Manager, MOVEit WAF ## How to fix CVE-2026-8037 The record marks a vendor fix as available for CVE-2026-8037. Patch reference: [https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-June-2026-CVE-2026-8037-CVE-2026-33691](https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-June-2026-CVE-2026-8037-CVE-2026-33691). Vendor advisory: [https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-June-2026-CVE-2026-8037-CVE-2026-33691](https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-June-2026-CVE-2026-8037-CVE-2026-33691). Because CVE-2026-8037 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-08-10. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory. ## Threat activity tracking CVE-2026-8037 3 tracked threats in the Threadlinqs corpus reference CVE-2026-8037, either in the campaign’s CVE list or as an indicator on the campaign record. - [CVE-2026-8037: Pre-Authentication Remote Code Execution in Progress Kemp LoadMaster via escape_quotes() Heap Out-of-Bounds Read](https://intel.threadlinqs.com/threat/TL-2026-1132) — CRITICAL · 2026-07-05 - [CVE-2026-8037: Unauthenticated OS Command Injection in Progress Kemp LoadMaster via Uninitialized Heap in escape_quotes() (CVSS 9.6-9.8, Active Exploitation)](https://intel.threadlinqs.com/threat/TL-2026-1067) — CRITICAL · 2026-07-02 - [CVE-2026-8037: Pre-Auth Command Injection RCE in Progress Kemp LoadMaster via Uninitialized-Heap escape_quotes() Flaw on /accessv2](https://intel.threadlinqs.com/threat/TL-2026-1045) — CRITICAL · 2026-07-01 ## Sources Enriched from CVE.org, NVD, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories, ProjectDiscovery Nuclei. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD. **Vendor advisory and patch** - [community.progress.com — vendor advisory](https://community.progress.com/s/article/LoadMaster-Critical-Security-Bulletin-June-2026-CVE-2026-8037-CVE-2026-33691) Canonical: https://intel.threadlinqs.com/cve/CVE-2026-8037 Full detection coverage and IOCs for threats exploiting CVE-2026-8037 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp