Cyber Resilience

CVE-2026-3518

Command Injection in Progress Loadmaster ≤ 7.2.54.17

Command Injection
Published
20 April 2026
Modified
01 May 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.4
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.20 97th percentile
Risk Priority 68 floored blend · peak EPSS

Summary

CVE-2026-3518 is a high-severity Command Injection (CWE-77) vulnerability in Progress Loadmaster. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-3518 is an OS Command Injection vulnerability that enables Remote Code Execution in the API of Progress ADC Products. It specifically affects the LoadMaster appliance, where unsanitized input in the 'killsession' command allows exploitation. Mapped to CWE-77, the issue carries a CVSS v3.1 base score of 8.4 (AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H) and was published on 2026-04-20T14:16:19.517.

An authenticated attacker with “All” permissions can exploit this vulnerability from an adjacent network (AV:A) with low attack complexity (AC:L) and no user interaction required. By injecting arbitrary OS commands through the vulnerable 'killsession' API endpoint, the attacker achieves remote code execution on the LoadMaster appliance, resulting in high impacts to confidentiality, integrity, and availability, amplified by the changed scope (S:C).

Progress has published an advisory covering CVE-2026-3518 along with related vulnerabilities (CVE-2026-3517, CVE-2026-3519, CVE-2026-4048, CVE-2026-21876) at https://community.progress.com/s/article/LoadMaster-Security-Vulnerabilites-CVE-2026-3517-CVE-2026-3518-CVE-2026-3519-CVE-2026-4048-CVE-2026-21876, which security practitioners should consult for mitigation and patching guidance.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

OS Command Injection Remote Code Execution Vulnerability in API in Progress ADC Products allows an authenticated attacker with “All” permissions to execute arbitrary commands on the LoadMaster appliance by exploiting unsanitized input in the 'killsession' command

CWE(s)
CWE-77

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.008 Network Device CLI Execution
Adversaries may abuse scripting or built-in command line interpreters (CLI) on network devices to execute malicious command and payloads.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-3519Same product: Progress Connection Manager For Objectscale
CVE-2026-3517Same product: Progress Connection Manager For Objectscale
CVE-2026-4048Same product: Progress Connection Manager For Objectscale
CVE-2026-8037Same product: Progress Connection Manager For Objectscale
CVE-2024-12251Same vendor: Progress
CVE-2026-59688Same product: Progress Connection Manager For Objectscale
CVE-2026-59687Same product: Progress Connection Manager For Objectscale
CVE-2024-7840Same vendor: Progress
CVE-2026-59686Same product: Progress Connection Manager For Objectscale
CVE-2026-59689Same product: Progress Connection Manager For Objectscale

Affected Assets

progress
connection manager for objectscale
≤ 7.2.63.1
progress
ecs connection manager
≤ 7.2.63.1
progress
loadmaster
≤ 7.2.54.17 · ≤ 7.2.63.1

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.3
  • V1.2.5
  • V1.2.8
  • V1.2.9

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover command-construction flaws before deployment.

SI-10 Information Input Validation good match

Input validation directly stops construction of commands from untrusted data containing special elements.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles include proper neutralization and safe command construction practices.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and neutralization that prevent command injection.

DE.CM-09 partial match
prevents

Runtime monitoring of software and data can detect anomalous command execution resulting from injection.

ID.RA-01 partial match
prevents

Identifying recorded vulnerabilities enables remediation of command-injection flaws before exploitation.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards require proper escaping and parameterization of commands, directly eliminating CWE-77.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development catches command-injection vulnerabilities before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and command construction practices that directly prevent command injection.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for controls against injection flaws including command injection.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles reduce the attack surface but do not prescribe the specific neutralization techniques needed.

A.8.31 Separation of development, test and production environments none match
none

Environment separation limits the blast radius of an exploited command injection but does not prevent the flaw itself.

References