HOMEVULNERABILITIESCVE-2020-15800
CRITICAL

CVE-2020-15800

CWE-122Published: January 12, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants) (All versions < V4.1.0). The webserver of the affected devices contains a vulnerability that may lead to a heap overflow condition. An attacker could cause this condition on the webserver by sending specially crafted requests. This could stop the webserver temporarily.

NVD Source

Technical Analysis

CVE-2020-15800 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

siemens132 product(s)
scalance x200-4pirt firmwarescalance x200-4pirtscalance x201-3pirt firmwarescalance x201-3pirtscalance x202-2irt firmwarescalance x202-2irtscalance x202-2pirt firmwarescalance x202-2pirtscalance x202-2pirt siplus net firmwarescalance x202-2pirt siplus netscalance x204irt firmwarescalance x204irt+120
Source: NVD CPE · 132 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf
ADVISORYhttps://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdf

All References (2)

→
https://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdfVendor Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-139628.pdfVendor Advisory

Quick Facts

CVE IDCVE-2020-15800
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-122
CISA KEVNo
Affected1 vendor(s)
PublishedJan 12, 2021

Related CVEs (CWE-122)

CVE-2025-23123
10.0
CVE-2026-24822
10.0
CVE-2022-34819
10.0
CVE-2026-46752
10.0
CVE-2021-25387
10.0
CVE-2021-21940
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15800 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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