Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated attacker take over certain devolo powerline networking devices by abusing the web management CGI component. Reported impact includes enabling hidden remote access services and obtaining root access without a password. Treat affected devices as high-risk if they are reachable from untrusted networks.
Executive priority
Prioritize this as urgent for any affected device in production or reachable from untrusted networks. The issue can lead to full device compromise, and the provided sources do not identify a patch. Reduce exposure immediately while confirming vendor support or replacement options.
Technical view
CVE-2019-25249 is an authentication bypass in the htmlmgr CGI script affecting devolo dLAN 500 AV Wireless+ firmware 3.1.0-1, with source data also listing dLAN 550 duo+ Starter Kit. Attackers can manipulate configuration parameters to enable telnet and remote shell services, reboot the device, and gain root-level access. CVSS is 9.8.
Likely exposure
Exposure is most likely where the device management interface is reachable from local users, guest networks, compromised internal hosts, or the internet. The source bundle does not confirm broad internet exposure or provide device population data.
Exploitation context
Public exploit information is referenced by Exploit-DB and Zero Science Lab. The source bundle does not show CISA KEV listing or confirmed active exploitation. Public technical detail increases risk, especially for reachable or unsupported devices.
Researcher notes
There is an affected-product ambiguity in the source bundle: title names dLAN 500 AV Wireless+ 3.1.0-1, while the affected entry lists dLAN 550 duo+ Starter Kit with that version string. Validate against CVE, Zero Science Lab, and vendor materials before scoping broadly.
Mitigation direction
- Identify any devolo dLAN 500 AV Wireless+ devices running firmware 3.1.0-1.
- Check vendor guidance for firmware updates or official remediation.
- Restrict management access to trusted administration networks only.
- Disable unnecessary remote access services if vendor-supported.
- Isolate or replace affected devices if no vendor fix is available.
Validation and detection
- Inventory devolo powerline devices and record exact model and firmware version.
- Confirm whether htmlmgr/web management is reachable from untrusted networks.
- Check whether telnet or remote shell services are unexpectedly enabled.
- Review device configuration for unauthorized changes if logs are available.
- Document affected assets and track vendor remediation status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-266: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-25249 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-46325CVE reference · exploit
- Official Vendor HomepageCVE reference · product
- Zero Science Lab Disclosure (ZSL-2019-5508)CVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Privilege Assignment
Incorrect Privilege Assignment represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.