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CVE-2019-12550

32
FAUCET Score

CVE-2019-12550 is a critical vulnerability affecting WAGO 852-303 (before FW06), 852-1305 (before FW06), and 852-1505 (before FW03) industrial switches, stemming from hardcoded user credentials for SSH and TELNET access. With a CVSS score of 9.8 (CRITICAL), this vulnerability allows unauthenticated remote attackers to gain full control over affected devices, leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or publicly available exploit code in Metasploit, Nuclei, or ExploitDB, the vulnerability has garnered significant community discussion and media coverage, indicating high awareness within the cybersecurity community.

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
2.66%
Probability of exploitation in next 30 days
EPSS Percentile
84.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0266 is in the 75th percentile among its peer group of 36,862 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

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 Advisory
wago.com / us
Vendor Advisory