by Kastro
Paper/Archive/CVE-2025-71317

CVE-2025-71317

Riello UPS NetMan 204 — NetMan 204 Hard-coded Backdoor Credentials

EPSS 0.4%public exploitCVSS 9.8
critical.is priorityof 100
47
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 37.4.374 × 207.5Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
NetMan 204all versions–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitexploit-db.com/exploits/52183refriello-ups.com/downloads/25-netman-204writeupvulncheck.com/advisories/netman-204-hard-coded-backdoor-credentials