Security readout for executives and security teams
Plain-English summary
This CVE affects NETGEAR WPN824EXT WiFi Range Extenders. During a firmware update, an attacker positioned as a network man-in-the-middle could substitute an older legitimate firmware image. The result is a forced downgrade, potentially reintroducing old weaknesses. The sources do not identify active exploitation or a specific fixed firmware version.
Executive priority
Treat this as a moderate legacy-device risk, not an emergency unless these extenders are still deployed in sensitive networks. The main business concern is loss of firmware update trust and the possibility of returning devices to older vulnerable firmware. Prioritize inventory, vendor guidance, and replacement planning where support is unclear.
Technical view
CVE-2022-38956 is a CWE-354 firmware integrity issue affecting WPN824EXT firmware 1.1.1_1.1.9 and earlier. CVSS 3.1 is 5.3, with network attack vector, high complexity, no privileges, and required user interaction. Integrity impact is high; confidentiality and availability impacts are listed as none.
Likely exposure
Exposure is most likely in environments still running NETGEAR WPN824EXT range extenders on firmware 1.1.1_1.1.9 or earlier, especially where administrators perform firmware uploads over networks that could be intercepted. The provided affected-product metadata is incomplete, but the CVE description names this model and firmware range.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Practical exploitation requires a man-in-the-middle position and an administrator performing a firmware upload. The impact is not direct code execution in the CVE record; it is downgrade of firmware integrity, which can restore older vulnerable behavior.
Researcher notes
The CVE record lists CWE-354 and an integrity-only impact with required user interaction. The attack scenario is downgrade by replacing a user-uploaded firmware image with an older original image. Evidence is limited: affected CPE data is not populated, and the provided sources do not name a patch level or exploitation in the wild.
Mitigation direction
- Check NETGEAR security guidance for model-specific firmware support and advisories.
- Inventory WPN824EXT devices and identify firmware versions at or below 1.1.1_1.1.9.
- Perform firmware maintenance only from trusted networks under administrator control.
- If no supported remediation exists, isolate, decommission, or replace affected devices.
- Restrict administrative access to trusted management networks and personnel.
Validation and detection
- Confirm whether any WPN824EXT devices exist in asset inventory.
- Record each device firmware version and compare against 1.1.1_1.1.9 and earlier.
- Review firmware update procedures for exposure to untrusted network paths.
- Check vendor guidance before assuming a fixed firmware version exists.
- Document compensating controls for any device that cannot be remediated.
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-354: 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-2022-38956 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
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
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:H/PR:N/UI:R/S:U/C:N/I:H/A:N1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.netgear.com/about/security/CVE reference · x_refsource_MISC
- https://hackmd.io/%40eupX2KdkT6iNpqJUWk9p4A/SyAnOSd1sCVE 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.
Improper Validation of Integrity Check Value
Improper Validation of Integrity Check Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.