CVE-2025-0626
Raw vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2025-0626 is a high-severity Hidden Functionality (CWE-912) vulnerability in Cisa (inferred from references). Its CVSS base score is 7.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Redundant Access (T1108); ranked in the top 35% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified map to CM-2 (Baseline Configuration) and CM-7 (Least Functionality) — 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-2025-0626 is a vulnerability in the "monitor" binary within the firmware of Contec CMS8000 patient monitors and certain patient monitors from Contec and Epsimed. When triggered by a user attempting a device update from the menu, the binary attempts to mount a network share to a hard-coded, routable IP address, bypassing the device's existing network settings. It also automatically enables the network interface if it is disabled. This functionality effectively creates a backdoor, enabling potential file upload and overwrite capabilities on the device.
The vulnerability can be exploited by any unauthenticated attacker (PR:N) with network access (AV:N) who can induce user interaction (UI:R), such as tricking a user into selecting the update option via the device menu; exploitation involves high complexity (AC:H). Successful exploitation grants high-impact confidentiality, integrity, and availability effects (C:H/I:H/A:H), with an overall CVSS v3.1 score of 7.5, allowing attackers to upload and overwrite files, potentially leading to full device compromise.
Advisories from CISA (ICSMA-25-030-01 and resources on Contec CMS8000) and FDA safety communications detail cybersecurity vulnerabilities in these patient monitors and provide mitigation guidance.
The backdoor connects to an IP address linked to China, as noted in security reporting, highlighting risks in healthcare device firmware supply chains.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-1797
Vulnerability Data
The "monitor" binary in the firmware of the affected product attempts to mount to a hard-coded, routable IP address, bypassing existing device network settings to do so. The function also enables the network interface of the device if it is…
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disabled. The function is triggered by attempting to update the device from the user menu. This could serve as a backdoor to the device, and could lead to a malicious actor being able to upload and overwrite files on the device.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Maintaining and reviewing a documented baseline configuration allows comparison that reveals any functionality absent from the approved specification.
Least-functionality configuration explicitly prohibits or restricts any capability not required by the approved baseline, blocking hidden additions.
Developer testing and evaluation activities are designed to discover undocumented or unspecified functionality after it has been introduced.
Documented development processes and standards require all functionality to be specified and visible, structurally preventing undocumented hidden features.
An SDLC that incorporates security engineering principles mandates that all product functions be part of the approved specification.
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.
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.
Security testing in development and acceptance can discover undocumented functionality before release.
Change management processes can catch unauthorized additions but do not inherently prevent hidden functionality from being introduced.
Monitoring activities can detect anomalous behavior from hidden functions but do not eliminate the weakness.
Secure development life cycle mandates documented requirements and design reviews that would expose undocumented hidden functionality.
Application security requirements explicitly define expected functionality, making hidden features a violation.
Secure system architecture and engineering principles require transparent, documented designs that preclude hidden functionality.