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CVE-2019-12549

33
FAUCET Score

CVE-2019-12549 describes a critical vulnerability in WAGO 852-303, 852-1305, and 852-1505 devices (before specific firmware versions) where hardcoded private keys for the SSH daemon are present. This allows an attacker to impersonate the device, leading to a CVSS score of 9.8 (CRITICAL) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.2.s0CPE matchmatch criteria
cpe:2.3:o:wago:852-303_firmware:*:*:*:*:*:*:*:*
< 1.1.6.s0CPE matchmatch criteria
cpe:2.3:o:wago:852-1305_firmware:*:*:*:*:*:*:*:*
< 1.1.5.s0CPE matchmatch criteria
cpe:2.3:o:wago:852-1505_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.26%
Probability of exploitation in next 30 days
EPSS Percentile
87.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0326 is in the 79th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cert.vde.com / en-us/advisories/vde-2019-013
Third Party Advisory
ics-cert.us-cert.gov / advisories/ICSA-19-164-02
Third Party AdvisoryUS Government Resource
wago.com / us
Vendor Advisory