Cyber Resilience

CVE-2023-26603

Published
26 April 2024
Modified
15 April 2026
CVSS Score v3.1 5.9
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0018 7th percentile
Risk Priority 44 floored blend · peak EPSS

Summary

CVE-2023-26603 is a medium-severity Creation of Temporary File With Insecure Permissions (CWE-378) vulnerability in Jumpcloud (inferred from references). Its CVSS base score is 5.9 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Data from Local System (T1005); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to AC-6 (Least Privilege) and SC-4 (Information in Shared System Resources) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

JumpCloud Agent before 1.178.0 Creates a Temporary File in a Directory with Insecure Permissions. This allows privilege escalation to SYSTEM via a repair action in the installer.

CWE(s)
CWE-378

Related Threats

MITRE ATT&CK Enterprise Techniques

T1005 Data from Local System Collection
Adversaries may search local system sources, such as file systems, configuration files, local databases, virtual machine files, or process memory, to find files of interest and sensitive data prior to Exfiltration.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1552 Unsecured Credentials Credential Access
Adversaries may search compromised systems to find and obtain insecurely stored credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-23454Shared CWE-378
CVE-2024-47884Shared CWE-378
CVE-2025-55629Shared CWE-378
CVE-2024-7358Shared CWE-378
CVE-2025-4953Shared CWE-378
CVE-2025-38747Shared CWE-378
CVE-2023-27408Shared CWE-378
CVE-2024-39872Shared CWE-378
CVE-2024-42052Shared CWE-378
CVE-2025-46685Shared CWE-378

Affected Assets

Jumpcloud
—
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

AC-6 Least Privilege good match

AC-6 limits privileges granted to processes creating or accessing temporary files, reducing blast radius of insecure permissions.

SC-4 Information in Shared System Resources good match

SC-4 directly stops unauthorized information transfer through shared resources such as temporary files created with weak permissions.

AC-3 Access Enforcement partial match

AC-3 enforces access authorizations on system resources including files, structurally stopping insecure temporary file permissions from being exploitable.

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 proper temporary-file creation and permission handling.

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 directly prohibit insecure temporary file creation and permissions.

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

Security testing can detect insecure temporary files but does not prevent their creation.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates secure handling of temporary files and permissions.

A.8.26 Application security requirements partial match
prevents

Application security requirements include secure creation and permissioning of temporary files.

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

Secure architecture principles require least-privilege file creation and access controls.

A.8.3 Information access restriction partial match
prevents

Information access restriction can limit exposure but does not address file creation itself.

References