Vulnerability · 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.T
Published Dec 8, 2025 · catalog updated Dec 8, 2025 · Infinera MTC-9
Last checked Oct 28, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-27019. EPSS is 0.43%. Act only if a listed version of Infinera MTC-9 is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-27020 · Critical
- CVE-2025-26489 · Medium
- CVE-2025-26488 · High
- CVE-2025-26487 · High
- Severity
- Critical9.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.43%
- Remediation
- Version ranges on file
- Affected products
- vendor Infinera MTC-9 R22.1.1.0275 <R23.0
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Infinera MTC-9 R22.1.1.0275 <R23.0R22.1.1.0275 <R23.0
How to fix CVE-2025-27019
Upgrade
CVE-2025-27019 lists a fix boundary at R23.0. Compare the installed build with that boundary before you change production.
Version check
Seen in R22.1.1.0275 <R23.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-27019. EPSS is 0.43%. Act only if a listed version of Infinera MTC-9 is installed.
Which versions are affected?
Compare what you have installed with Infinera MTC-9 R22.1.1.0275 <R23.0 R22.1.1.0275 <R23.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.43%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 8, 2025 · EUVD
Detected
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.
Dec 8, 2025 · EUVD
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2025-27019
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-27019
30-day exploitation probability 0.43%
first.org - EUVDVulnerability recordEUVD-2025-201701
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.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 28, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 28, 2026
- CVE.orgOct 28, 2026
- EUVDOct 27, 2026