How severe is CVE-2025-27019?

CVE-2025-27019 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-27019 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27019?

CVE-2025-27019 affects Nokia Infinera Mtc-9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27019?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-27019 have an EU (EUVD) identifier?

Yes. CVE-2025-27019 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201701.

When was CVE-2025-27019 published?

CVE-2025-27019 was published on 2025-12-08 and last updated on 2026-06-17.

CVE-2025-27019

CVE-2025-27019 is a critical-severity vulnerability in Nokia Infinera Mtc-9 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201701
Weakness: CWE-306
Affected product: Nokia Infinera Mtc-9 Firmware
Published: 2025-12-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-27019?: 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.
How severe is CVE-2025-27019?: CVE-2025-27019 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-27019 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27019?: CVE-2025-27019 affects Nokia Infinera Mtc-9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27019?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-27019 have an EU (EUVD) identifier?: Yes. CVE-2025-27019 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201701.
When was CVE-2025-27019 published?: CVE-2025-27019 was published on 2025-12-08 and last updated on 2026-06-17.

References

https://www.cvcn.gov.it/cvcn/cve/CVE-2025-27019

Affected products (1)

cpe:2.3:o:nokia:infinera_mtc-9_firmware:*:*:*:*:*:*:*:*

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