Security readout for executives and security teams
Plain-English summary
CVE-2020-13393 is a reported router web-server flaw in several Tenda AC-series models. A crafted POST request to a parental-control endpoint can overflow memory and potentially let an attacker run code on the device. The sources do not provide CVSS, patch status, authentication requirements, or active exploitation evidence.
Executive priority
Prioritize this as a high-risk edge-device issue if affected Tenda routers are deployed, especially in exposed or unmanaged locations. Business urgency depends on confirmed inventory, management-interface reachability, and vendor support availability.
Technical view
The CVE describes a stack buffer overflow in Tenda router httpd processing /goform/saveParentControlInfo. The deviceId and time parameters are copied with strcpy into a local stack variable, potentially overwriting the return address and enabling arbitrary code execution. Affected firmware versions are listed for AC6, AC9, AC15, and AC18.
Likely exposure
Exposure is most relevant where affected Tenda router web administration services are reachable by attackers. The sources do not state whether authentication is required or whether WAN-side access is enabled by default, so confirm device configuration and network reachability directly.
Exploitation context
The record describes arbitrary code execution potential but does not cite public exploitation, in-the-wild activity, or CISA KEV listing. Treat exploitability as plausible from the technical description, but do not assume active exploitation from the provided evidence.
Researcher notes
Evidence is limited to the CVE description and linked research reference. No CVSS, CWE, authentication prerequisite, patch version, or KEV status is provided. Avoid overstating exploitation until additional vendor or threat-intelligence sources confirm it.
Mitigation direction
- Inventory Tenda AC6, AC9, AC15, and AC18 routers and firmware versions.
- Check Tenda guidance for fixed firmware or replacement recommendations.
- Restrict web administration access to trusted management networks only.
- Disable internet-facing router administration where operationally possible.
- Replace devices if no supported vendor fix is available.
Validation and detection
- Compare deployed router models and firmware against the CVE description.
- Verify whether the web administration interface is reachable from untrusted networks.
- Confirm whether vendor firmware or support guidance exists for each device.
- Review perimeter exposure records for affected router management services.
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.
Execution 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 lookupCVE-2020-13393 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://joel-malwarebenchmark.github.io/CVE reference · x_refsource_MISC
- https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13393-Tenda-vulnerability/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.