CVE-2019-12550
No exploitation reported by the sources we read.
- Published2019-06-17
- Fixed in1.1.6.s0
- WeaknessCWE-798
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
WAGO 852-303 before FW06, 852-1305 before FW06, and 852-1505 before FW03 devices contain hardcoded users and passwords that can be used to login via SSH and TELNET.
Timeline
dates in UTC- 2019-06-1717:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-12550?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-12550?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.1 | < 1.1.6.s0 | 1.1.6.s0 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.1 | < 1.1.5.s0 | 1.1.5.s0 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.2 | < 1.2.2.s0 | 1.2.2.s0 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
WAGO Industrial Managed Switches 852-303, 852-1305, and 852-1505
Industrial Managed Switch 852-1305: All versions prior to v1.1.6.S0 · Industrial Managed Switch 852-1505: All versions prior to v1.1.5.S0 · Industrial Managed Switch 852-303: All versions prior to v1.2.2.S0
Fix
- Update Wago 852-1305 firmware to 1.1.6.s0
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 productsWAGO recommends users update their managed switch to the latest firmware published June 7, 2019, or later. New firmware can be requested in the Runtime Software dropdown within the Downloads section at the links below:
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 products852-303: v1.2.2.S0 or later
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 products852-1305: v1.1.6.S0 or later
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 products852-1505: v1.1.5.S0 or later
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 productsRestrict network access to the switch
- Mitigation from the vendor CISA ICSA-19-164-02 · 3 productsRestrict network access to the SSH server.
Advisories and patches
- www.wago.comVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.09.8read 2026-10-23
- NVDCVSS 2.010read 2026-10-23
- NVDweakness (CWE)CWE-798read 2026-10-23
- FIRST EPSSEPSS score2.7 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2019-06-17
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2019-12550?
Is CVE-2019-12550 actively exploited?
What is the CVSS score for CVE-2019-12550?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.