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Fencer Vulns
critical 9.8

CVE-2019-25249 json

devolo dLAN 500 AV Wireless+ 3.1.0-1 Remote Code Execution via htmlmgr

published 2025-12-24 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-205315

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

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.

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
10 mo ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • exploit-db.com https://www.exploit-db.com/exploits/46325 referenced PoC, tagged "exploit" by a source, unverified
  • zeroscience.mk https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5508.php referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • devolo AG dLAN 550 duo+ Starter Kit

Classification

Weakness
  • CWE-266 Incorrect Privilege Assignment

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.