Security readout for executives and security teams
Plain-English summary
CVE-2022-40101 is a denial-of-service flaw reported in Tenda i9 firmware v1.0.0.8(3828). A remote, unauthenticated attacker could send crafted input that crashes or disrupts the device, affecting availability rather than data confidentiality or integrity.
Executive priority
Treat this as a high-priority availability risk for affected network devices. It is not currently evidenced as actively exploited, but exposed devices could be disrupted remotely and may impact business connectivity.
Technical view
The CVE describes a CWE-787 buffer overflow in the Tenda i9 formWifiMacFilterSet function. CVSS 3.1 is 7.5 with network attack vector, low complexity, no privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is most relevant for environments still running Tenda i9 firmware v1.0.0.8(3828). Risk increases if the device management or related web interface is reachable from untrusted networks. The CVE record has incomplete structured affected-product data.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Public details indicate a crafted string can trigger denial of service, but the available evidence supports availability impact only, not code execution or data theft.
Researcher notes
The main public evidence is the CVE record and a GitHub vulnerability write-up. The CVE description names Tenda i9 v1.0.0.8(3828), formWifiMacFilterSet, CWE-787, and DoS impact; structured affected CPE data is absent.
Mitigation direction
- Identify Tenda i9 devices and confirm firmware versions.
- Check Tenda guidance for any fixed firmware or official workaround.
- Restrict management interface access to trusted networks only.
- Remove or replace unsupported exposed devices if no fix exists.
- Monitor for device crashes or repeated suspicious admin requests.
Validation and detection
- Review asset inventory for Tenda i9 firmware v1.0.0.8(3828).
- Confirm whether management interfaces are reachable from untrusted networks.
- Check logs or uptime history for unexplained device restarts.
- Track CVE and vendor guidance for updated remediation details.
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.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-40101 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/splashsc/IOT_Vulnerability_Discovery/blob/main/Tenda/Tenda_i9/buffer_overflow_formWifiMacFilterSet.mdCVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.