Security readout for executives and security teams
Plain-English summary
This CVE describes a critical memory corruption flaw in specific Tenda AC15 and AC18 router firmware. A network-reachable, unauthenticated condition could allow full compromise impacts according to CVSS. The sources do not identify a fixed firmware version or confirm exploitation in the wild.
Executive priority
Prioritize this for rapid inventory and containment where these router models exist, especially at branch offices or small sites. The potential impact is full device compromise, but remediation confidence depends on vendor guidance that is not present in the supplied sources.
Technical view
Tenda AC15 and AC18 firmware V15.03.05.19 contain a stack overflow in fromDhcpListClient involving combined list* parameters. The CVE is mapped to CWE-787 and scored CVSS 3.1 9.8 with network attack vector, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Organizations using Tenda AC15 or AC18 routers running firmware V15.03.05.19 are the stated exposure. The CVE metadata's affected vendor/product fields are incomplete, so validate by model and firmware rather than CPE alone.
Exploitation context
The source bundle includes public technical references, but CISA KEV is false and no cited source confirms active exploitation. Treat internet-exposed or untrusted-network-exposed management surfaces as higher risk because the CVSS vector is unauthenticated and network-reachable.
Researcher notes
The record names AC15 and AC18 V15.03.05.19 and function fromDhcpListClient, but structured affected-product metadata is incomplete and no fix is cited. Do not rely on CPE matching alone; verify device model, firmware, and exposure manually.
Mitigation direction
- Check Tenda guidance for a fixed firmware or advisory before choosing a remediation path.
- Upgrade affected routers if a vendor-supported fixed firmware is available.
- Restrict router administration access to trusted networks only.
- Remove affected routers from internet-facing or guest-accessible networks.
- Replace unsupported devices if no maintained fix is available.
Validation and detection
- Inventory Tenda AC15 and AC18 devices and record firmware versions.
- Flag firmware V15.03.05.19 as in-scope for this CVE.
- Confirm whether administrative services are reachable from untrusted networks.
- Review vendor support channels for fixed firmware or replacement guidance.
- Track this CVE for future KEV or vendor-advisory changes.
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-2022-40869 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/CPSeek/Router-vuls/blob/main/Tenda/AC15/fromDhcpListClient-list.mdCVE reference · x_refsource_MISC
- https://github.com/CPSeek/Router-vuls/blob/main/Tenda/AC18/fromDhcpListClient-list.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.