CVE-2020-15800

highpriority · track · 40EPSS 0.017 · 77 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.67% (77th) EPSS

CVSS 9.3 · high

Is it mine?

78 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-27

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSCALANCE X-200 switch family (incl. SIPLUS NET variants)siemens_psirt
Update to V5.2.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109801131/
FixedSCALANCE X-200IRT switch family (incl. SIPLUS NET variants)siemens_psirt
Update to V5.5.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109792534/
FixedSCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)siemens_psirt
Update to V4.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109773547/
FixedSCALANCE X-200 switch family (incl. SIPLUS NET variants)cisa_csaf_ot
Update to V5.2.5 or later version
https://support.industry.siemens.com/cs/ww/en/view/109801131/
FixedSCALANCE X-200IRT switch family (incl. SIPLUS NET variants)cisa_csaf_ot
Update to V5.5.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109792534/
FixedSCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)cisa_csaf_ot
Update to V4.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109773547/
MitigationSCALANCE X-200 switch family (incl. SIPLUS NET variants)siemens_psirt
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).
MitigationSCALANCE X-200IRT switch family (incl. SIPLUS NET variants)siemens_psirt
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).
MitigationSCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)siemens_psirt
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).
MitigationSCALANCE X-200 switch family (incl. SIPLUS NET variants)cisa_csaf_ot
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).
MitigationSCALANCE X-200IRT switch family (incl. SIPLUS NET variants)cisa_csaf_ot
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).
MitigationSCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)cisa_csaf_ot
Limit network traffic of web servers of Scalance X switches to trusted connections by firewall rules (port 443/tcp).

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 9–9.8

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:Csecondary · CISA US

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:Csecondary · Siemens ProductCERT DE

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USCWE-122USCWE-122USCWE-787US

affected products (78)

Products and version ranges known to be affected.

SCALANCE X-200 switch family (incl. SIPLUS NET variants)all versionscisa_csaf_otUS
SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)all versionscisa_csaf_otUS
SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)all versionscisa_csaf_otUS
Siemens SCALANCE X-200 switch family (incl. SIPLUS NET variants)< V5.2.5cisa_csaf_otUS
Siemens SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)< V5.5.0cisa_csaf_otUS
Siemens SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)< V4.1.0cisa_csaf_otUS
Siemens SCALANCE X-200 switch family (incl. SIPLUS NET variants)All versions → V5.2.5enisa_euvdEU
Siemens SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)All versions → V5.5.0enisa_euvdEU
Siemens SCALANCE X-300 switch family (incl. X408 and SIPLUS NET variants)All versions → V4.1.0enisa_euvdEU
siemens scalance x200-4pirt firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x200-4pirt_firmware:*:*:*:*:*:*:*:*
siemens scalance x201-3pirt firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x201-3pirt_firmware:*:*:*:*:*:*:*:*
siemens scalance x202-2irt firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x202-2irt_firmware:*:*:*:*:*:*:*:*
siemens scalance x202-2pirt firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x202-2pirt_firmware:*:*:*:*:*:*:*:*
siemens scalance x202-2pirt siplus net firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x202-2pirt_siplus_net_firmware:*:*:*:*:*:*:*:*
siemens scalance x204irt firmware< 5.5.0nvdUScpe:2.3:o:siemens:scalance_x204irt_firmware:*:*:*:*:*:*:*:*
siemens scalance x307-3 firmwareall versionsnvdUScpe:2.3:o:siemens:scalance_x307-3_firmware:*:*:*:*:*:*:*:*
siemens scalance x307-3ld firmwareall versionsnvdUScpe:2.3:o:siemens:scalance_x307-3ld_firmware:*:*:*:*:*:*:*:*
siemens scalance x308-2 firmwareall versionsnvdUScpe:2.3:o:siemens:scalance_x308-2_firmware:*:*:*:*:*:*:*:*
siemens scalance x308-2ld firmwareall versionsnvdUScpe:2.3:o:siemens:scalance_x308-2ld_firmware:*:*:*:*:*:*:*:*
siemens scalance x308-2lh firmwareall versionsnvdUScpe:2.3:o:siemens:scalance_x308-2lh_firmware:*:*:*:*:*:*:*:*

showing 20 of 78

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-139628SSA-139628: Vulnerabilities in Web Server for Scalance X Products2021-01-12csaf · siemens_psirtDE
Several SCALANCE X switches contain vulnerabilities in the web server of the affected devices. An unauthenticated attacker could reboot, cause denial-of-service conditions and potentially impact the system by other means through heap and buffer overflow vulnerabilities. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.
ICSA-21-012-05Siemens SCALANCE X Products (Update B)2021-01-12icsa · cisa_csaf_otUS
Several SCALANCE X switches contain vulnerabilities in the web server of the affected devices. An unauthenticated attacker could reboot, cause denial-of-service conditions and potentially impact the system by other means through heap and buffer overflow vulnerabilities. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates are not, or not yet available.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd siemens_psirt NVD CVE.org MITRE

published 2021-01-12modified 2026-06-17

references (6)

External citations — patches, advisories, analysis.

scry

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