Skip to content
Noroxi
NVD / CVE Program· CNA siemens

CVE-2020-28400: Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a denial of service condition.

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.8% (FIRST EPSS); higher than 79.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 8.7 · v4.0—No exploit No fix recorded
Published
Jul 13, 2021
Updated
Jun 16, 2026
EPSS
1.8% · 79th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
34 / 40 · 8.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · siemens
7.5
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-28400

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for siemens records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
siemensdk standard ethernet controller evaluation kit firmware
siemensdk standard ethernet controller evaluation kit
siemensek-ertec 200 evaulation kit firmware
siemensek-ertec 200 evaulation kit
siemensek-ertec 200p evaluation kit firmware
siemensek-ertec 200p evaluation kit
siemensruggedcom rm1224 firmware
siemensruggedcom rm1224
siemensscalance m-800 firmware
siemensscalance m-800
siemensscalance s615 firmware
siemensscalance s615

and 145 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • siemens dk standard ethernet controller evaluation kit firmwareall versions
  • siemens ek-ertec 200 evaulation kit firmwareall versions
  • siemens ek-ertec 200p evaluation kit firmwarebefore 4.7
  • siemens ruggedcom rm1224 firmwarebefore 6.4
  • siemens scalance m-800 firmwarebefore 6.4
  • siemens scalance s615 firmwarebefore 6.4
  • siemens scalance w1700 firmwareall versions
  • siemens scalance w700 firmwareall versions
  • siemens scalance x200-4 p irt firmwarebefore 5.5.0
  • siemens scalance x201-3p irt firmwarebefore 5.5.0
  • siemens scalance x201-3p irt pro firmwarebefore 5.5.0
  • siemens scalance x202-2 irt firmwarebefore 5.5.0
  • siemens scalance x202-2p irt pro firmwarebefore 5.5.0
  • siemens scalance x204 irt firmwarebefore 5.5.0
  • siemens scalance x204 irt pro firmwarebefore 5.5.0
  • siemens scalance x204-2 firmwarebefore 5.2.5
  • siemens scalance x204-2fm firmwarebefore 5.2.5
  • siemens scalance x204-2ld firmwarebefore 5.2.5
  • siemens scalance x204-2ld ts firmwarebefore 5.2.5
  • siemens scalance x204-2ts firmwarebefore 5.2.5

Versions reported by the vendor

Affected version ranges reported by the assigning authority (siemens). Independent of NVD's CPE analysis and usually ahead of it.

  • Siemens Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller

    • all versionsaffected

  • Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200

    • all versionsaffected

  • Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P

    • before V4.7affected

  • Siemens RUGGEDCOM RM1224 LTE(4G) EU

    • before V6.4affected

  • Siemens RUGGEDCOM RM1224 LTE(4G) NAM

    • before V6.4affected

  • Siemens SCALANCE M804PB

    • before V6.4affected

  • Siemens SCALANCE M812-1 ADSL-Router

    • before V6.4affected
    • before V6.4affected

  • Siemens SCALANCE M816-1 ADSL-Router

    • before V6.4affected
    • before V6.4affected

  • Siemens SCALANCE M826-2 SHDSL-Router

    • before V6.4affected

  • Siemens SCALANCE M874-2

    • before V6.4affected

  • Siemens SCALANCE M874-3

    • before V6.4affected

  • Siemens SCALANCE M874-3 3G-Router (CN)

    • before V6.4affected

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-770 · Allocation of Resources Without Limits or Throttling

CVSS vector

CVSS: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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records