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Exploited vulnerability · CISA KEV

Is CVE-2023-6448 exploited? Yes: in CISA KEV since 11 Dec 2023

Gociux · Unitronics Vision PLC and HMI · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-6448, Unitronics Vision PLC and HMI Insecure Default Password Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 11 Dec 2023, 6 days after it was published. It affects Unitronics Vision PLC and HMI. If you run it, CISA's required action is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 11 Dec 2023
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity9.8CVSS 3.1 · critical
US federal due18 Dec 2023BOD 22-01 deadline

What it is

Unitronics Vision Series PLCs and HMIs ship with an insecure default password, which if left unchanged, can allow attackers to execute remote commands.

VendorUnitronics (1 exploited CVE in KEV)
ProductVision PLC and HMI
VulnerabilityUnitronics Vision PLC and HMI Insecure Default Password Vulnerability
WeaknessCWE-1188
Published5 Dec 2023
Added to KEV11 Dec 2023
Reported by (CNA)cisa-cg

What to do

  1. Check whether you run it. Look for Vision PLC and HMI in your asset inventory, including appliances and cloud images. Stack check lists every exploited Unitronics CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 5 Dec 2023.
  4. Get told next time. Email alerts when CISA adds a CVE for Unitronics.

References

Questions

Is CVE-2023-6448 being exploited?

Yes. CISA added CVE-2023-6448 to the Known Exploited Vulnerabilities catalog on 11 Dec 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-6448 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2023-6448?

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Check Unitronics's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Vision PLC and HMI and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2023 · act-now radar.

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