CVE-2020-15799

highpriority · track · 26OT risk · elevatedEPSS 0.011 · 65 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.09% (65th) EPSS

CVSS 7.1 · high

Is it mine?

77 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

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). The vulnerability could allow an unauthenticated attacker to reboot the device over the network by using special urls from integrated web server of the affected products.

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-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/
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-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).

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6–7.5

v2.07.1highAV:N/AC:M/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 6.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.16.5mediumAV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-306USCWE-306USCWE-306USCWE-306US

affected products (77)

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
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-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 AG SCALANCE X-200all versionsfstec_bduRU
Siemens AG SCALANCE X-200 IRT≤ 5.5.0fstec_bduRU
Siemens AG SCALANCE X-300≤ 4.1.0fstec_bduRU
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 77

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 (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu 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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