CVE-2025-71317

CRITICAL 9.8

NetMan 204 Hard-coded Backdoor Credentials

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

NetMan 204 contains a hard-coded backdoor account with the username and password 'eurek' that grants administrative access. A remote, unauthenticated attacker can authenticate through the cgi-bin/login.cgi endpoint (for example /cgi-bin/login.cgi?username=eurek&password=eurek, which due to lax parameter validation can be shortened to /cgi-bin/login.cgi?username=eurek%20eurek) to obtain administrator privileges, allowing them to alter device configuration, enable the telnet/SSH services, and reset local user credentials.

CWE	CWE-798
Vendor	riello ups
Product	netman 204
Published	Jun 5, 2026
Last Updated	Jun 5, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Riello UPS / NetMan 204

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/52183 riello-ups.com: https://www.riello-ups.com/downloads/25-netman-204 vulncheck.com: https://www.vulncheck.com/advisories/netman-204-hard-coded-backdoor-credentials

Credits

parsa rezaie khiabanloo