CVE-2025-41756
Low-priv remote attacker can write arbitrary files via undocumented API (wwwubr.cgi)
Is CVE-2025-41756 being exploited?
Not confirmed. CVE-2025-41756 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2025-41756?
CVE-2025-41756 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-41756?
Yes. A fix has been recorded for CVE-2025-41756. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-41756 affect?
CVE-2025-41756 affects wwwubr.cgi (ubr-editfile). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-41756?
Disable the endpoint; patch when released; restrict access
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote write of arbitrary files via the ubr-editfile endpoint; could enable privilege escalation or system compromise.
Patch when possible
- affected< 6.0.1.0
- affected< 6.0.1.0
- affected< 6.0.1.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.