# CVE-2025-27020: Improper configuration of the SSH service in Infinera MTC-9 allows an unauthenticated attacker to execute arbitrary…

Source: https://junglewise.ai/threats/cve-2025-27020-improper-configuration-of-the-ssh-service-in-infinera-mtc-9  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-08  
License: CC BY 4.0 with a link back

CVE-2025-27020 · Severity: critical · CVSS 9.8 · Published 2025-12-08

Improper configuration of the SSH service in Infinera MTC-9 allows an unauthenticated attacker to execute arbitrary commands and access data on file system

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This issue affects MTC-9: from R22.1.1.0275 before R23.0.

Technologies: [Nokia Infinera Mtc-9](https://junglewise.ai/threats/technologies/infinera-mtc-9), [Nokia Infinera Mtc-9 Firmware](https://junglewise.ai/threats/technologies/infinera-mtc-9-firmware). Vendors: [Nokia](https://junglewise.ai/threats/vendors/nokia).

## Quick answers

**Is CVE-2025-27020 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-27020 being exploited in the wild.

**How severe is CVE-2025-27020?** Critical severity, with a CVSS score of 9.8, published 8 December 2025.

**Which products and versions are affected?** Nokia Infinera Mtc-9, Nokia Infinera Mtc-9 Firmware. The advisory does not name versions.

**Is there a fix for CVE-2025-27020?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-27020?** Check whether you run Nokia Infinera Mtc-9 or Nokia Infinera Mtc-9 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Nokia Infinera Mtc-9
- Nokia Infinera Mtc-9 Firmware

## Related threats

- [Remote shell service (RSH) in Infinera MTC-9 version R22.1.1.0275 allows an attacker to utilize password-less user…](https://junglewise.ai/threats/cve-2025-27019-remote-shell-service-rsh-in-infinera-mtc-9-version-r22-1-1-0275)
- [Improper input validation in the Netconf service in Infinera MTC-9 allows remote authenticated users to crash the…](https://junglewise.ai/threats/cve-2025-26489-improper-input-validation-in-the-netconf-service-in-infinera-mtc)
- [Improper Input Validation vulnerability in Infinera MTC-9 allows remote unauthenticated users to crash the service and…](https://junglewise.ai/threats/cve-2025-26488-improper-input-validation-vulnerability-in-infinera-mtc-9-allows)
- [Server-Side Request Forgery (SSRF) vulnerability in Infinera MTC-9 version allows remote unauthenticated users to gain…](https://junglewise.ai/threats/cve-2025-26487-server-side-request-forgery-ssrf-vulnerability-in-infinera-mtc-9)