CVE-2025-27019 | Remote shell service (RSH) in Infinera MTC-9

Remote shell service (RSH) in Infinera MTC-9 version R22.1.1.0275 allows an attacker to utilize password-less user accounts and obtain system access by activating a reverse shell.This issue affects MTC-9: from R22.1.1.0275 before R23.0.

Published: 2025-12-08 Last update: 2025-12-22 Assigner: a6d3dc9e-0591-4a13-bce7-0f5b31ff6158 Source: a6d3dc9e-0591-4a13-bce7-0f5b31ff6158
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-27019 is rated Moderate Risk (50.8/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.40%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-27019

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.05% 0.40% +0.35%
2 2025-12-14 0.04% 0.05% +0.01%
3 2025-12-08 — 0.04% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-27019

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 a6d3dc9e-0591-4a13-bce7-0f5b31ff6158

Weakness enumeration for CVE-2025-27019

Affected software / configurations for CVE-2025-27019

Vendor Product Version Raw CPE
nokia infinera_mtc-9_firmware >= 22.1.1.0275, < 23.0 cpe:2.3:o:nokia:infinera_mtc-9_firmware:*:*:*:*:*:*:*:*

References for CVE-2025-27019

URL Tags
https://www.cvcn.gov.it/cvcn/cve/CVE-2025-27019 Third Party Advisory
cvelogic Threat Intelligence