What’s Vulnerable › Vulnerabilities

CVE-2025-71317: NetMan 204 Hard-coded Backdoor Credentials

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-05 · updated 2026-10-07
• Weakness: CWE-798

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.

Affected products

• Riello UPS NetMan 204: 0

References

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

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