CVE-2019-12549

highpriority · track · 40OT risk · elevatedEPSS 0.033 · 88 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

3.26% (88th) EPSS

CVSS 10 · high

Is it mine?

19 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

WAGO 852-303 before FW06, 852-1305 before FW06, and 852-1505 before FW03 devices contain hardcoded private keys for the SSH daemon. The fingerprint of the SSH host key from the corresponding SSH daemon matches the embedded private key.

remediations

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

A vendor fix is available.

Fixedwago_psirt
Update your managed switch to the latest firmware: 852-303 (>= V1.2.2.S0) 852-1305 (>= V1.1.6.S0) 852-1505 (>= V1.1.5.S0) Firmwares published on Jun 7, 2019 or later are fixed. Please refer to the corresponding manual.
MitigationIndustrial Managed Switch 852-1305cisa_csaf_ot
Do not directly connect the device to the Internet.
MitigationIndustrial Managed Switch 852-1505cisa_csaf_ot
Do not directly connect the device to the Internet.
MitigationIndustrial Managed Switch 852-303cisa_csaf_ot
Do not directly connect the device to the Internet.

cvss

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

10.0

010

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

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 10 · impact 10

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US

v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · WAGO PSIRT DE

v3.09criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-798USprimaryCWE-321USCWE-798USCWE-798US

affected products (19)

Products and version ranges known to be affected.

Industrial Managed Switch 852-1305: All versions prior to v1.1.6.S0all versionscisa_csaf_otUS
Industrial Managed Switch 852-1505: All versions prior to v1.1.5.S0all versionscisa_csaf_otUS
Industrial Managed Switch 852-303: All versions prior to v1.2.2.S0all versionscisa_csaf_otUS
WAGO Industrial Managed Switch 852-1305< 1.1.6.S0cisa_csaf_otUS
WAGO Industrial Managed Switch 852-1505< 1.1.5.S0cisa_csaf_otUS
WAGO Industrial Managed Switch 852-303< 1.2.2.S0cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
WAGO Kontakttechnik GmbH & Co. KG Wago 852-1305≤ 1.1.6.S0fstec_bduRU
WAGO Kontakttechnik GmbH & Co. KG Wago 852-1505≤ 1.1.5.S0fstec_bduRU
WAGO Kontakttechnik GmbH & Co. KG Wago 852-303≤ 1.2.2.S0fstec_bduRU
wago 852-1305 firmware< 1.1.6.s0nvdUScpe:2.3:o:wago:852-1305_firmware:*:*:*:*:*:*:*:*
wago 852-1505 firmware< 1.1.5.s0nvdUScpe:2.3:o:wago:852-1505_firmware:*:*:*:*:*:*:*:*
wago 852-303 firmware< 1.2.2.s0nvdUScpe:2.3:o:wago:852-303_firmware:*:*:*:*:*:*:*:*
Firmware <V1.1.5.S0 installed on 852-1505all versionswago_psirtDE
Firmware <V1.1.6.S0 installed on 852-1305all versionswago_psirtDE
Firmware <V1.2.2.S0 installed on 852-303all versionswago_psirtDE
Firmware V1.1.5.S0 installed on 852-1505all versionsfixedwago_psirtDE
Firmware V1.1.6.S0 installed on 852-1305all versionsfixedwago_psirtDE
Firmware V1.2.2.S0 installed on 852-303all versionsfixedwago_psirtDE

advisories (2)

Vendor and ecosystem advisories describing this.

VDE-2019-013WAGO: Multiple Vulnerabilities in industrial managed switches2019-06-12csaf · wago_psirtDE
Multiple vulnerabilities have been identified in WAGO 852-303, 852-1305 and 852-1505 industrial managed ethernet switches.
ICSA-19-164-02WAGO Industrial Managed Switches 852-303, 852-1305, and 852-15052019-06-13icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow a compromise of the managed switch, resulting in disruption of communication, and root access to the operating system.

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 wago_psirt NVD CVE.org MITRE

published 2019-06-17modified 2026-06-17

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+2276 more

references (15)

External citations — patches, advisories, analysis.

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