7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.054 Low
EPSS
Percentile
93.2%
CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit
Vendor: WAGO
Equipment: Series 750-88x and 750-87x
Vulnerability: Use of Hard-coded Credentials
This vulnerability allows a remote attacker to change the settings or alter the programming of the device.
The following versions of Series 750-88x and 750-87x, programmable logic controllers, are affected:
3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798
By exploiting the undocumented service access, it is possible to change the settings of a device and access web-based management with administrator privileges. An attacker can exploit this vulnerability to lock other users out from the device or open closed network ports. It is also possible to use this service access as an FTP user and exchange or delete the application.
CVE-2019-10712 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Reported by JΓΆrn Schneeweisz/Recurity Labs to CERT-Bund coordinated by CERT@VDE with NCCIC.
WAGO released a security advisory available at:
<https://www.wago.com/de/download/public/Sicherheitshinweis-SA-SYS-2019-001/SA-SYS-2019-001.pdf>
WAGO recommends updating to the newest firmware as listed above and taking the following defensive measures:
CERT@VDE has published an advisory regarding this vulnerability at the following location:
<https://cert.vde.com/en-us/advisories/vde-2019-008>
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2019-10712
cert.vde.com/en-us/advisories/vde-2019-008
cwe.mitre.org/data/definitions/798.html
public.govdelivery.com/accounts/USDHSCISA/subscriber/new?topic_id=USDHSCISA_138
twitter.com/CISAgov
twitter.com/intent/tweet?text=WAGO%20Series%20750-88x%20and%20750-87x+https://www.cisa.gov/news-events/ics-advisories/icsa-19-106-02
www.dhs.gov
www.dhs.gov/foia
www.dhs.gov/performance-financial-reports
www.facebook.com/CISA
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www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
www.instagram.com/cisagov
www.linkedin.com/company/cybersecurity-and-infrastructure-security-agency
www.linkedin.com/sharing/share-offsite/?url=https://www.cisa.gov/news-events/ics-advisories/icsa-19-106-02
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://www.cisa.gov/news-events/ics-advisories/icsa-19-106-02
www.usa.gov/
www.wago.com/de/download/public/Sicherheitshinweis-SA-SYS-2019-001/SA-SYS-2019-001.pdf
www.whitehouse.gov/
www.youtube.com/@cisagov
mailto:?subject=WAGO%20Series%20750-88x%20and%20750-87x&body=www.cisa.gov/news-events/ics-advisories/icsa-19-106-02
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10 High
AI Score
Confidence
High
0.054 Low
EPSS
Percentile
93.2%