Security readout for executives and security teams
Plain-English summary
Some Actiontec C1000A routers can store malicious HTML in the Website Blocking settings page. If an administrator views that page, their browser may render attacker-supplied content. The source bundle does not name a vendor patch or confirm real-world exploitation.
Executive priority
Treat this as a targeted router-management risk, not an enterprise-wide emergency. Prioritize environments with Actiontec C1000A devices, shared administrative access, or exposed management interfaces.
Technical view
CVE-2018-19922 is persistent XSS in advancedsetup_websiteblocking.html on Actiontec C1000A firmware through CAC004-31.30L.95. The CVE describes arbitrary HTML insertion through the TodUrlAdd parameter in a /urlfilter.cmd POST request. Authentication requirements and patch status are not stated in the provided sources.
Likely exposure
Exposure is likely limited to deployed Actiontec C1000A routers running firmware through CAC004-31.30L.95, especially where the router management interface is reachable by untrusted users or networks.
Exploitation context
The CVE is not listed as KEV in the bundle. A public GitHub reference exists, so technical details are public, but the provided evidence does not show active exploitation in the wild.
Researcher notes
The CVE affected-product fields are sparse, but the description identifies Actiontec C1000A firmware through CAC004-31.30L.95. Sources do not clarify authentication, privilege level, CVSS, CWE, or patched versions.
Mitigation direction
- Identify Actiontec C1000A routers and record firmware versions.
- Check Actiontec or ISP guidance for fixed firmware or replacement options.
- Restrict router management access to trusted administrative networks only.
- Remove unexpected website-blocking entries after investigation.
- Avoid exposing router administration interfaces to the public internet.
Validation and detection
- Inventory routers for Actiontec C1000A model and firmware through CAC004-31.30L.95.
- Review Website Blocking settings for unexpected HTML-like entries.
- Confirm management interfaces are not reachable from untrusted networks.
- Check change logs or advisories for 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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-19922 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/logern5/c1000a_xss/blob/master/README.mdCVE reference · x_refsource_MISC
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.