CVE-2019-25250Public exploitNetwork attack vector

Administrative changes via unchecked CSRF parameter

Published Dec 24, 2025 · Updated Dec 24, 2025

Cross-site request forgery in devolo dLAN 550 duo+ Starter Kit firmware 500 AV Wireless+ 3.1.0-1 allows attackers to alter settings. The /cgi-bin/htmlmgr handler accepts predictable configuration POST actions with an empty _csrf value that the application never validates. A logged-in administrator must visit an attacker-controlled page, allowing that page to submit device changes with the administrator's session.

CVSS severity5.1
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in devolo dLAN 550 duo+ Starter Kit firmware 500 AV Wireless+ 3.1.0-1 allows attackers to alter settings. The /cgi-bin/htmlmgr handler accepts predictable configuration POST actions with an empty _csrf value that the application never validates. A logged-in administrator must visit an attacker-controlled page, allowing that page to submit device changes with the administrator's session.

The record

CVE
CVE-2019-25250
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
devolo
Product
dLAN 550 duo+
Classifications
CWE-352, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=500 AV Wireless+ 3.1.0-1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

devolo · dLAN 550 duo+version=500 AV Wireless+ 3.1.0-1

Published CVSS scores

5.3VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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