CVE-2025-27020 Improper configuration of SSH service in Infinera MTC-9
Unauthenticated attackers can execute arbitrary commands and access file system data on Infinera MTC-9 devices due to improper SSH configuration.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27020?
CVE-2025-27020 is a critical authentication bypass vulnerability in Infinera MTC-9, published on 8 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper configuration of the SSH service in Infinera MTC-9 allows an unauthenticated attacker to execute arbitrary commands and access data on file system
.
This issue affects MTC-9: from R22.1.1.0275 before R23.0.
Weakness: CWE-306
Which versions are affected by CVE-2025-27020?
It affects 1 product.
Products include Nokia Infinera Mtc-9 Firmware.
How do I fix CVE-2025-27020?
No fix has been published for CVE-2025-27020 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-27020 being exploited?
There is no known exploitation of CVE-2025-27020 in the wild and no public exploit code.
Other vulnerabilities in Infinera MTC-9
- CVE-2025-27019 Remote shell service (RSH) in Infinera MTC-9
- CVE-2025-26487 Server Side Request Forgery (SSRF) in the web server of Infinera MTC-9
- CVE-2025-26488 Improper input validation in XML Management service in Infinera MTC-9
- CVE-2025-26489 Improper input validation in Netconf service in Infinera MTC-9
Sources
Also known as GHSA-3645-f6qv-w99w.