Security readout for executives and security teams
Plain-English summary
CVE-2018-20335 is a denial-of-service issue in ASUSWRT 3.0.0.4.384.20308. An unauthenticated user can crash or disrupt the router web service, potentially affecting administration of the device. The source bundle does not provide CVSS scoring, patch details, or evidence of active exploitation.
Executive priority
Treat this as an availability risk for router administration, especially if management interfaces are internet-facing. Prioritize exposure reduction and firmware validation, but avoid emergency escalation unless business-critical devices are exposed or operational outages are observed.
Technical view
The CVE describes unauthenticated DoS against ASUSWRT httpd through the /APP_Installation.asp?= URI. Reported impact is limited to the httpd service based on available sources. No CWE, CVSS vector, affected CPE list, or vendor remediation version is included in the supplied evidence.
Likely exposure
Exposure is most likely on ASUSWRT 3.0.0.4.384.20308 devices where the web management httpd service is reachable from untrusted networks. The bundle does not identify specific router models, CPEs, or later affected firmware versions.
Exploitation context
The CVE is not listed as KEV in the provided bundle. The cited description says exploitation is unauthenticated and causes DoS, but the bundle does not provide evidence of public exploitation, weaponized tooling, or observed attacks.
Researcher notes
The public evidence is sparse: one affected ASUSWRT version, one unauthenticated httpd DoS path, no CVSS, no CWE, no model list, and no patch version. Further analysis should focus on vendor advisories and asset-specific firmware confirmation.
Mitigation direction
- Inventory ASUSWRT devices and confirm firmware versions against vendor guidance.
- Restrict web management access to trusted administrative networks only.
- Disable remote web management where it is not required.
- Monitor the httpd service for crashes, restarts, or availability loss.
- Check ASUS or STAR Labs guidance for confirmed fixed firmware details.
Validation and detection
- Confirm whether any devices run ASUSWRT 3.0.0.4.384.20308.
- Verify management interfaces are not exposed to the public internet.
- Review access logs for requests referencing /APP_Installation.asp.
- Check monitoring for unexplained httpd outages or restarts.
- Document any model and firmware gaps for vendor follow-up.
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-2018-20335 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://starlabs.sg/advisories/18-20335/CVE 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.