Security readout for executives and security teams
Plain-English summary
A reported flaw in a specific Tenda AC11 router firmware build could let an attacker crash the device, causing network disruption. The public sources do not provide a severity score, patch status, or evidence of active exploitation.
Executive priority
Handle as a network availability risk, not a confirmed breach issue. Prioritize internet-exposed or business-critical routers, because successful denial of service could interrupt connectivity even without data theft.
Technical view
CVE-2021-46263 describes a stack buffer overflow in the wifiTime module of Tenda AC11_V02.03.01.104_CN. The stated impact is denial of service via crafted overflow data. Authentication requirements, exposed interface, and reliable exploit conditions are not established in the source bundle.
Likely exposure
Exposure is most likely limited to environments running Tenda AC11_V02.03.01.104_CN, especially if router management or affected services are reachable from untrusted networks. The bundle does not prove other versions or products are affected.
Exploitation context
The source bundle does not cite CISA KEV or active exploitation. It states DoS is possible through crafted overflow data and links to a public GitHub disclosure, but does not establish exploitation in the wild.
Researcher notes
Evidence is sparse: no CVSS, CWE, affected CPEs, patch reference, or KEV listing are provided. Avoid broad product claims. Focus validation on the named firmware and confirm vendor remediation independently.
Mitigation direction
- Inventory Tenda AC11 devices and record firmware versions.
- Check Tenda guidance for patched firmware or supported upgrade paths.
- Restrict router management access to trusted administrative networks.
- Disable unnecessary remote administration where operationally possible.
- Replace unsupported affected devices if no vendor fix is available.
Validation and detection
- Confirm whether any router runs AC11_V02.03.01.104_CN firmware.
- Review whether management interfaces are exposed to untrusted networks.
- Check device logs and monitoring for unexplained crashes or reboots.
- Verify vendor advisories before applying firmware changes.
- Document compensating controls for any device awaiting remediation.
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-2021-46263 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/11CVE 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.