Security readout for executives and security teams
Plain-English summary
This vulnerability affects the Tenda i9 firmware version named in the CVE and can let a network attacker crash the device service through a malformed request. The known impact is denial of service, not data theft or device takeover, but disruption to wireless or edge connectivity can still be operationally significant.
Executive priority
Prioritize remediation for affected devices supporting business-critical wireless or network access. The issue is availability-focused and unauthenticated, so a reachable device can become a disruption point even without evidence of active exploitation.
Technical view
CVE-2022-40102 is a CWE-787 buffer overflow in Tenda i9 v1.0.0.8(3828), reported in the formwrlSSIDset function. CVSS v3.1 is 7.5: network reachable, low complexity, no privileges, no user interaction, with high availability impact and no stated confidentiality or integrity impact.
Likely exposure
Exposure is likely limited to Tenda i9 devices running v1.0.0.8(3828). Risk is higher where the device management surface is reachable from untrusted networks. The CVE affected-product metadata is incomplete, so confirm against actual device models and firmware inventories.
Exploitation context
The CVE and referenced public write-up describe denial of service through a crafted string. The source bundle does not show CISA KEV listing or evidence of active exploitation. Treat exploitability as plausible from network reachability, but do not claim confirmed in-the-wild attacks.
Researcher notes
The strongest source evidence is the CVE record plus the GitHub disclosure reference. The bundle does not include vendor confirmation, patched versions, exploit telemetry, or complete CPE data. Validation should focus on firmware inventory, management-plane exposure, and vendor remediation status.
Mitigation direction
- Inventory Tenda i9 devices and confirm firmware v1.0.0.8(3828).
- Check Tenda or device supplier guidance for fixed firmware or replacement advice.
- Restrict management interfaces to trusted administration networks only.
- Block internet exposure to affected device web interfaces.
- Plan replacement or isolation if no supported fix is available.
Validation and detection
- Verify device model and firmware from trusted asset records or administration UI.
- Confirm affected interfaces are not exposed to the internet or guest networks.
- Review logs and monitoring for unexplained device restarts or service crashes.
- Document vendor guidance status and remediation decision for each affected device.
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-2022-40102 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_formwrlSSIDset.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.