CVE-2024-45841: Incorrect permission assignment for critical resource issue exists in UD-LT1 firmware Ver.2.1.9 and earlier and UD-LT1/EX firmware Ver.2.1.9 and earlier. If an…

PriorityP180medium6.5CVSS 3.0

AVNACLPRLUINSUCHINAN

ITWVulnCheck KEV

Exploited in the wild

EPSS

0.48%

38.0th percentile

Incorrect permission assignment for critical resource issue exists in UD-LT1 firmware Ver.2.1.9 and earlier and UD-LT1/EX firmware Ver.2.1.9 and earlier. If an attacker with the guest account of the affected products accesses a specific file, the information containing credentials may be obtained.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
i-o_data_device_inc	ud-lt1	—	—
i-o_data_device_inc	ud-lt1_ex	—	—

Detection & IOCsextracted from sources · hover to see the quote

→Guest account credential abuse: a low-privileged guest account can access sensitive files containing authentication/credential information on UD-LT1 / UD-LT1/EX firmware ≤ v2.1.9 ↗
→Monitor for unauthorized access to the device configuration interface exposed directly to the internet (WAN) without VPN — confirmed active exploitation vector reported by customers ↗
→Alert on unexpected changes to device settings or firewall state on I-O Data UD-LT1 / UD-LT1/EX routers, as attackers are actively modifying settings and disabling firewalls post-exploitation ↗
→Regularly monitor and verify device settings to detect unauthorized changes early; a compromised device may require factory reset ↗

·Affected firmware versions: UD-LT1 and UD-LT1/EX firmware Ver.2.1.9 and earlier are vulnerable; v2.1.9 only patches CVE-2024-52564, NOT CVE-2024-45841 — full fix requires v2.2.0 ↗
·CVE-2024-45841 is one of three co-occurring zero-days (alongside CVE-2024-47133 and CVE-2024-52564) being actively exploited together; detections and mitigations should account for all three ↗
·Mitigation until patch: disable Remote Management for all internet connection methods (WAN Port, Modem, VPN settings) and restrict access to VPN-connected networks only; also change the default guest password to 10+ characters ↗

CVSS provenance

nvdv3.06.5MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

vulncheck6.5MEDIUM

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