Security readout for executives and security teams
Plain-English summary
CVE-2022-43103 is a critical flaw reported in Tenda AC23 firmware V16.03.07.45_cn. A network attacker may be able to crash or take control of the device through unsafe handling of a QoS configuration parameter. The provided sources do not identify active exploitation or a vendor fix.
Executive priority
Prioritize this for any environment using Tenda AC23 devices, especially exposed branch, home-office, or small-office routers. The vulnerability is critical and remotely reachable, but current evidence in the bundle does not show confirmed active exploitation or a named patch.
Technical view
The issue is described as a stack overflow in the formSetQosBand function through the list parameter. The CVSS 3.1 score is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. The CVE maps to CWE-787, out-of-bounds write.
Likely exposure
Exposure is likely limited to Tenda AC23 devices running firmware V16.03.07.45_cn. Risk is highest where vulnerable devices are reachable from untrusted networks. The CVE metadata does not provide complete vendor/product CPEs, so asset validation is important.
Exploitation context
The source bundle includes a public researcher reference and a critical CVSS rating. CISA KEV status is false, and the provided sources do not state active exploitation in the wild. Treat exploitability as plausible, but do not assume observed attacks without additional evidence.
Researcher notes
The CVE record is sparse: affected CPEs are listed as unavailable, and no fix is named. The key technical detail is stack overflow via list in formSetQosBand on firmware V16.03.07.45_cn. Additional vendor confirmation would improve remediation confidence.
Mitigation direction
- Inventory Tenda AC23 devices and verify firmware version.
- Check Tenda guidance for updated firmware or replacement direction.
- Restrict device management exposure to trusted networks only.
- Remove internet exposure for affected devices where possible.
- Monitor for unexpected QoS configuration changes or device instability.
Validation and detection
- Confirm whether any deployed device is Tenda AC23 V16.03.07.45_cn.
- Review network exposure for vulnerable devices without sending exploit payloads.
- Check vendor advisories for firmware status and supported upgrade paths.
- Validate compensating controls block untrusted access to device administration.
- Record findings because CVE product metadata is incomplete.
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-2022-43103 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
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.