Description
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.
Published: 2026-06-05
Score: 9.3 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Fri, 05 Jun 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 05 Jun 2026 18:15:00 +0000

Type Values Removed Values Added
Description 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.
Title NetMan 204 Hard-coded Backdoor Credentials
First Time appeared Riello-ups
Riello-ups netman 204
Riello-ups netman 204 Firmware
Weaknesses CWE-798
CPEs cpe:2.3:h:riello-ups:netman_204:-:*:*:*:*:*:*:*
cpe:2.3:o:riello-ups:netman_204_firmware:-:*:*:*:*:*:*:*
Vendors & Products Riello-ups
Riello-ups netman 204
Riello-ups netman 204 Firmware
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Riello-ups Netman 204 Netman 204 Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-06-05T19:35:30.991Z

Reserved: 2026-06-05T16:56:46.183Z

Link: CVE-2025-71317

cve-icon Vulnrichment

Updated: 2026-06-05T19:35:26.967Z

cve-icon NVD

Status : Deferred

Published: 2026-06-05T18:16:54.737

Modified: 2026-06-05T19:02:13.790

Link: CVE-2025-71317

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-05T20:00:04Z

Weaknesses