Security readout for executives and security teams
Plain-English summary
CVE-2022-40851 is a critical memory-safety flaw reported in Tenda AC15 firmware V15.03.05.19. The CVSS vector indicates it can be reached over a network without authentication or user interaction, with potential full confidentiality, integrity, and availability impact.
Executive priority
Treat this as urgent for any environment using Tenda AC15 routers. The business risk is highest for internet-facing or unmanaged devices because compromise could affect routing, traffic confidentiality, and service availability.
Technical view
The CVE describes a stack overflow in the Tenda AC15 fromAddressNat function, classified as CWE-787 out-of-bounds write. The public record gives CVSS 3.1 score 9.8 with AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Vendor/product metadata is incomplete in the CVE bundle.
Likely exposure
Exposure is most likely where Tenda AC15 devices running V15.03.05.19 are deployed, especially if relevant router management or NAT-related interfaces are reachable from untrusted networks. The provided CVE metadata does not enumerate CPEs or broader affected versions.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The network, unauthenticated CVSS vector means exploitation would be plausible if the vulnerable interface is reachable, but no active exploitation claim is supported here.
Researcher notes
Evidence is limited to the CVE record and a public GitHub reference. The affected table is not populated with precise vendor/product CPEs, and no patch information is included. Avoid assuming other Tenda models or firmware versions are affected without vendor confirmation.
Mitigation direction
- Identify any Tenda AC15 devices and confirm firmware version V15.03.05.19.
- Check Tenda/vendor guidance for fixed firmware or official mitigation.
- Restrict management and configuration interfaces to trusted administrative networks.
- Remove public internet exposure for affected router services.
- Replace unsupported affected devices if no vendor fix is available.
Validation and detection
- Inventory edge and branch routers for Tenda AC15 hardware.
- Confirm firmware versions through approved administrative interfaces.
- Review firewall rules for exposed router management or configuration access.
- Check vendor advisories for CVE-2022-40851 remediation status.
- Monitor affected devices for crashes, resets, or unexplained configuration 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-2022-40851 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/addressNat.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.