CVE-2025-27020Network attack vector

Unauthenticated command execution via SSH misconfiguration

Published Dec 8, 2025 · Updated Dec 8, 2025

Missing authentication in the SSH service of Infinera MTC-9 R22.1.1.0275 through versions before R23.0 allows remote attackers to execute commands. The disclosed mechanism is limited to an improper SSH service configuration that accepts unauthenticated access; no file, setting, or credential behavior is published. Network access to SSH is sufficient, granting command execution and file-system data access without credentials.

CVSS severity9.8
Critical
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in the SSH service of Infinera MTC-9 R22.1.1.0275 through versions before R23.0 allows remote attackers to execute commands. The disclosed mechanism is limited to an improper SSH service configuration that accepts unauthenticated access; no file, setting, or credential behavior is published. Network access to SSH is sufficient, granting command execution and file-system data access without credentials.

The record

CVE
CVE-2025-27020
Published
Dec 8, 2025
Updated
Dec 8, 2025
Vendor
Infinera
Product
MTC-9
Classifications
CWE-306, CAPEC-114, T1021.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=R22.1.1.0275 <R23.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Infinera · MTC-9version=R22.1.1.0275 <R23.0

Published CVSS scores

9.8ENISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-114Authentication Abuse
T1021.004Remote Services SSH

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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