Security readout for executives and security teams
Plain-English summary
This CVE describes a denial-of-service flaw in a specific Tenda AC11 router firmware build. An attacker may be able to crash router functionality using crafted data. The sources do not provide severity scoring, patch status, authentication requirements, or evidence of real-world exploitation.
Executive priority
Treat this as a targeted availability risk until asset exposure is confirmed. Priority rises if affected routers support business-critical networks or expose management services to untrusted users.
Technical view
CVE-2021-46321 is reported as a stack buffer overflow in the wifiBasicCfg module of Tenda AC Series Router AC11_V02.03.01.104_CN. The documented impact is denial of service via crafted overflow data. Source data omits CVSS, CWE, precise attack vector, and remediation details.
Likely exposure
Exposure is most relevant to environments running Tenda AC11 firmware AC11_V02.03.01.104_CN. The provided affected-product metadata is incomplete, so teams should validate device model and firmware directly before scoping impact.
Exploitation context
The source bundle does not show active exploitation, and KEV is false. Public references describe a DoS condition, but the available evidence does not establish exploitation in the wild, privilege requirements, or network reachability conditions.
Researcher notes
Evidence is thin: NVD-style metadata lists no CVSS, CWE, or complete affected CPEs. Analysis should center on confirming firmware, reachability, and whether vendor remediation exists before assigning operational severity.
Mitigation direction
- Check Tenda guidance for firmware updates or official remediation.
- Identify and prioritize any Tenda AC11 devices on the named firmware build.
- Restrict router administration interfaces to trusted networks only.
- Replace or isolate affected devices if no supported fix is available.
Validation and detection
- Inventory Tenda AC11 routers and record firmware versions.
- Confirm whether any device runs AC11_V02.03.01.104_CN.
- Review uptime, crash, and reboot history for unexplained DoS symptoms.
- Check vendor and asset-management records for 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-2021-46321 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/Ainevsia/CVE-Request/tree/main/Tenda/15CVE 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.