CVE-2020-28400

A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: DK Standard...

8.7 High

Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.86%Up 1.4 points since Jul 14, 2021

What each source reports

CVE List Score used 8.7

Record: CVE-2020-28400
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

EUVDEUVD-2020-20859 8.7

Record: EUVD-2020-20859
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-7jh3-xvhx-2q5v 8.7

A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: DK Standard...

A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P (All versions), RUGGEDCOM RM1224 (All Versions < 6.4), SCALANCE M-800 (All Versions < 6.4), SCALANCE S615 (All Versions < 6.4), SCALANCE W1700 IEEE 802.11ac (All versions), SCALANCE W700 IEEE 802.11n (All versions), SCALANCE X200-4 P IRT (All Versions < V5.5.0), SCALANCE X201-3P IRT (All Versions < V5.5.0), SCALANCE X201-3P IRT PRO (All Versions < V5.5.0), SCALANCE X202-2 IRT (All Versions < V5.5.0), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All Versions < V5.5.0), SCALANCE X202-2P IRT PRO (All Versions < V5.5.0), SCALANCE X204 IRT (All Versions < V5.5.0), SCALANCE X204 IRT PRO (All Versions < V5.5.0), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions), SCALANCE X204-2FM (All versions), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions), SCALANCE X204-2LD TS (All versions), SCALANCE X204-2TS (All versions), SCALANCE X206-1 (All versions), SCALANCE X206-1LD (incl. SIPLUS NET variant) (All versions), SCALANCE X208 (incl. SIPLUS NET variant) (All versions), SCALANCE X208PRO (All versions), SCALANCE X212-2 (All versions), SCALANCE X212-2LD (All versions), SCALANCE X216 (All versions), SCALANCE X224 (All versions), SCALANCE X302-7EEC (All versions), SCALANCE X304-2FE (All versions), SCALANCE X306-1LDFE (All versions), SCALANCE X307-2EEC (All versions), SCALANCE X307-3 (All versions), SCALANCE X307-3LD (All versions), SCALANCE X308-2 (incl. SIPLUS NET variant) (All versions), SCALANCE X308-2LD (All versions), SCALANCE X308-2LH (All versions), SCALANCE X308-2LH+ (All versions), SCALANCE X308-2M (All versions), SCALANCE X308-2M POE (All versions), SCALANCE X308-2M TS (All versions), SCALANCE X310 (All versions), SCALANCE X310FE (All versions), SCALANCE X320-1FE (All versions), SCALANCE X320-3LDFE (All versions), SCALANCE XB-200 (All versions), SCALANCE XC-200 (All versions), SCALANCE XF-200BA (All versions), SCALANCE XF201-3P IRT (All Versions < V5.5.0), SCALANCE XF202-2P IRT (All Versions < V5.5.0), SCALANCE XF204 (All versions), SCALANCE XF204 IRT (All Versions < V5.5.0), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions), SCALANCE XF204-2BA IRT (All Versions < V5.5.0), SCALANCE XF206-1 (All versions), SCALANCE XF208 (All versions), SCALANCE XM400 (All versions < V6.3.1), SCALANCE XP-200 (All versions), SCALANCE XR-300WG (All versions), SCALANCE XR324-12M (All versions), SCALANCE XR324-12M TS (All versions), SCALANCE XR324-4M EEC (All versions), SCALANCE XR324-4M POE (All versions), SCALANCE XR324-4M POE TS (All versions), SCALANCE XR500 (All versions < V6.3.1), SIMATIC CFU PA (All versions), SIMATIC IE/PB-LINK V3 (All versions), SIMATIC MV500 family (All versions < V3.0), SIMATIC NET CM 1542-1 (All versions), SIMATIC NET CP1616/CP1604 (All Versions >= V2.7), SIMATIC NET CP1626 (All versions), SIMATIC NET DK-16xx PN IO (All Versions >= V2.7), SIMATIC PROFINET Driver (All versions), SIMATIC Power Line Booster PLB, Base Module (MLFB: 6ES7972-5AA10-0AB0) (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All Versions < V4.5), SIMOCODE proV Ethernet/IP (All versions < V1.1.3), SIMOCODE proV PROFINET (All versions < V2.1.3), SOFTNET-IE PNIO (All versions). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial-of-service condition. The vulnerability can be triggered if a large amount of DCP reset packets are sent to the device.

Record: GHSA-7jh3-xvhx-2q5v
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-770
Updated: 2026-11-02

NVD 8.7

Record: CVE-2020-28400
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-770
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-28400 is a high vulnerability (CVSS 8.7) in Seimens Scalance M812-1 Adsl-router Annex A, published July 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.86%, the 79th percentile. No source names a fixed version.