Cyber Resilience

CVE-2026-45140

RCE

Published
17 September 2026
Modified
18 September 2026
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.013 70th percentile
Risk Priority 74 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2026-45140 is a critical-severity Path Traversal (CWE-22) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 30% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-3 (Access Enforcement) and AC-6 (Least Privilege) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

Chamilo LMS is an open-source learning management system. Prior to 2.0.1, Chamilo LMS allows an unauthenticated remote attacker to execute arbitrary code on the server. The authoritative advisory does not identify the affected endpoint, component, input, or exploitation mechanism. This…

more

issue is fixed in version 2.0.1.

CWE(s)

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.
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
T1059.002 AppleScript Execution
Adversaries may abuse AppleScript for execution.
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
T1059.005 Visual Basic Execution
Adversaries may abuse Visual Basic (VB) for execution.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-22152Shared CWE-22, CWE-434
CVE-2026-24897Shared CWE-22, CWE-434
CVE-2023-40050Shared CWE-434, CWE-94
CVE-2023-48217Shared CWE-434, CWE-94
CVE-2026-42879Shared CWE-434, CWE-94
CVE-2024-7559Shared CWE-434, CWE-94
CVE-2026-25510Shared CWE-434, CWE-94
CVE-2025-58159Shared CWE-434, CWE-94
CVE-2025-34086Shared CWE-434, CWE-94
CVE-2023-6846Shared CWE-434, CWE-94

Affected Assets

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)
  • V13.2.4
  • V5.3.2
  • V5.1.1
  • V1.3.1

Mitigating Controls (NIST 800-53 r5) AI

Enforces the intended directory access authorizations that path traversal would otherwise bypass.

Least privilege reduces the impact of any unauthorized file access obtained via traversal.

Least functionality restricts the file types and automatic processing capabilities the system will accept.

Developer testing and evaluation finds code paths that accept and execute externally influenced strings.

Requiring documented secure development standards and tools enforces use of safe code-generation APIs and escaping.

SC-18 Mobile Code partial match

Mobile-code controls define, authorize, and block unacceptable uploaded code before automatic processing occurs.

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

PR.PS-06's SDLC practices directly target injection flaws via secure coding and testing (mostly), yet as a single broad outcome it leaves many code-generation specifics unaddressed (partial).

PR.AA-05 partial match
prevents

Enforcing least-privilege access permissions directly prevents unauthorized retrieval of sensitive files stored under the web root.

PR.DS-01 partial match
prevents

Protecting confidentiality of data-at-rest mitigates exposure of files that should never have been placed under the web root.

PR.PS-01 partial match
prevents

Hardened configuration baselines and change control prevent placement of sensitive files in publicly served directories.

PR.PS-02 partial match
prevents

Patching/maintenance can remediate known path-traversal flaws in deployed software (partial prevention of exploitability) but does nothing to stop the coding defect from being introduced in the first place.

PR.PS-05 partial match
prevents

Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.

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.

mitigates

Classification identifies sensitive data so it can be placed outside the web root.

mitigates

Access-control policy defines who may reach files under the web root.

mitigates

Granting only the minimum rights prevents unauthorized retrieval of sensitive files.

prevents

Secure SDLC mandates input validation and path sanitization that directly prevent path traversal.

prevents

Application security requirements include rules for safe file handling and canonicalization.

prevents

Secure architecture principles require least-privilege file access and directory isolation.

References