What is CVE-2019-25249?

CVE-2019-25249 is a critical-severity vulnerability in Devolo Ag Dlan 550 Duo+ Starter Kit, classified under Incorrect Privilege Assignment. CVSS score: 9.8/10. Published 2025-12-24.

How severe is CVE-2019-25249?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in Devolo Ag Dlan 550 Duo+ Starter Kit

CVE-2019-25249

devolo dLAN 500 AV Wireless+ 3.1.0-1 contains an authentication bypass vulnerability that allows attackers to enable hidden services through the htmlmgr CGI script. Attackers can enable telnet and remote shell services, reboot the device, and gain root access without a password by manipulating system configuration parameters.

Published 2025-12-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (33.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.000

Affected products

Devolo Ag Dlan 550 Duo+ Starter Kit — versions 500 AV Wireless+ 3.1.0-1

Weakness classification (CWE)

CWE-266 — Incorrect Privilege Assignment

References

www.exploit-db.com/exploits/46325 (exploit)
www.devolo.com (product)
www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5508.php (third-party-advisory)

Frequently asked questions

What is CVE-2019-25249?: CVE-2019-25249 is a critical-severity vulnerability in Devolo Ag Dlan 550 Duo+ Starter Kit, classified under Incorrect Privilege Assignment. CVSS score: 9.8/10. Published 2025-12-24.
How severe is CVE-2019-25249?: Critical severity. CVSS v3 base score is 9.8 out of 10.