A denial of service vulnerability exists in MDT's firmware for the KNXnet/IP Secure…
Priority MEDIUM 40Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A denial of service vulnerability exists in MDT's firmware for the KNXnet/IP Secure router SCN-IP100.03 and KNX IP interface SCN-IP000.03 before v3.0.4, that allows a remote attacker to turn the device unresponsive to all requests on the KNXnet/IP Secure layer, until the device is rebooted, via a SESSION_REQUEST frame with a modified total length field.
Why it matters now
EPSS 0.04618 91st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:* | before 3.0.4 | Vulnerable | Mdt |
| cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mdt |
| cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:* | before 3.0.4 | Vulnerable | Mdt |
| cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Mdt |
- cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:* Versions before 3.0.4 Vulnerable ·Mdt
- cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mdt
- cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:* Versions before 3.0.4 Vulnerable ·Mdt
- cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Mdt
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37740
- 2026-10-03 Alias added: GHSA-fgcc-2fx7-p23v
References
Sources
- CVE-2021-37740 · CVE Program
- CVE-2021-37740 · NVD
- FIRST EPSS
- GHSA-fgcc-2fx7-p23v · GitHub Advisory Database · CC BY 4.0
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