Security readout for executives and security teams
Plain-English summary
CVE-2022-40105 is a high-severity availability issue in Tenda i9 firmware v1.0.0.8(3828). A specially crafted request to the Wi-Fi MAC filter handling code can trigger a buffer overflow and cause denial of service. The provided sources do not name a vendor fix.
Executive priority
Treat this as a high-priority availability risk for any deployed Tenda i9 infrastructure. The main business concern is service disruption, not data theft, based on current sources. Prioritize exposure reduction and firmware verification.
Technical view
The CVE describes a buffer overflow in the formWifiMacFilterGet function, classified as CWE-787. CVSS 3.1 is 7.5 with network attack vector, low complexity, no privileges, and no user interaction, with high availability impact only.
Likely exposure
Exposure is most relevant for organizations operating Tenda i9 devices on firmware v1.0.0.8(3828), especially if the management interface is reachable from untrusted networks. The structured affected-product metadata is incomplete, so asset confirmation is important.
Exploitation context
The sources state that a crafted string can cause denial of service. CISA KEV status is false in the bundle, and no provided source confirms active exploitation, exploit prevalence, or code execution impact.
Researcher notes
The evidence is limited to CVE metadata and a public vulnerability write-up. The affected CPE fields are not populated, and no vendor advisory or patch is included in the provided bundle. Avoid assuming impact beyond denial of service.
Mitigation direction
- Identify Tenda i9 devices and confirm firmware version.
- Check Tenda or device-support channels for updated firmware guidance.
- Restrict management access to trusted admin networks or VPN only.
- Remove internet exposure for device administration interfaces.
- Segment or replace affected devices if no vendor fix is available.
Validation and detection
- Inventory wireless access points and match Tenda i9 firmware versions.
- Verify whether management interfaces are reachable from untrusted networks.
- Review device stability logs for unexpected crashes or reboots.
- Confirm compensating controls restrict administrative access paths.
- Track vendor and CVE updates for any newly published fix.
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-2022-40105 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_formWifiMacFilterGet.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.