Security readout for executives and security teams
Plain-English summary
This CVE affects a named Tenda AC11 firmware build and can let an attacker crash the router service or device. The business impact is availability: connectivity loss, operational disruption, and support burden. The sources do not show data theft, remote code execution, active exploitation, or a confirmed vendor fix.
Executive priority
Treat as a targeted availability risk for sites using the named Tenda firmware. Prioritize inventory and management-plane restriction first; escalate replacement or firmware updates if affected devices support critical connectivity.
Technical view
CVE-2021-46264 is reported as a stack buffer overflow in the onlineList module of Tenda AC Series Router AC11_V02.03.01.104_CN. The described impact is denial of service through crafted overflow data. The public record does not provide CVSS, CWE, authentication requirements, reachable interface details, or remediation guidance.
Likely exposure
Exposure is most likely where Tenda AC11 routers run firmware AC11_V02.03.01.104_CN. The sources do not define whether exploitation requires local network access, administrative access, or internet exposure.
Exploitation context
CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation. A public GitHub reference exists, but the supplied metadata supports only DoS impact, not broader compromise.
Researcher notes
The record is sparse. Key missing items are CVSS, CWE mapping, exact attack preconditions, affected product normalization, and vendor remediation. Avoid assuming exploitation path or patch availability beyond the public CVE description and reference.
Mitigation direction
- Inventory Tenda AC11 routers and identify firmware versions.
- Check Tenda or device-provider guidance for fixed firmware or replacement advice.
- Restrict router management access to trusted administrative networks.
- Avoid exposing router administration interfaces to the public internet.
- Monitor affected devices for crashes, restarts, or unexplained service loss.
Validation and detection
- Confirm whether any deployed router matches AC11_V02.03.01.104_CN.
- Review asset records for internet-facing Tenda management interfaces.
- Verify administrative access is limited to trusted networks.
- Check logs or monitoring for unexplained router restarts or DoS symptoms.
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-2021-46264 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/9CVE 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.