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CVE-2023-6448· NVD / CVE Program· CNA cisa-cg

Unitronics VisiLogic uses a default administrative password

Unitronics VisiLogic before version 9.9.00, used in Vision and Samba PLCs and HMIs, uses a default administrative password. An unauthenticated attacker with network access can take administrative control of a vulnerable system.

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
Dec 5, 2023
Updated
Jun 17, 2026
EPSS
2.1% · 81th percentile
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Action score

70

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
1 / 30 · 2.1%

CISA SSVC decision

Exploitation
active
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · cisa-cg
9.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Dec 11, 2023. That signals real attacks, not theory.

Remediation deadline for government agencies: Dec 18, 2023.

Affected systems

VendorProduct
unitronicsvision1210 firmware
unitronicsvision1210
unitronicsvision1040 firmware
unitronicsvision1040
unitronicsvision700 firmware
unitronicsvision700
unitronicsvision570 firmware
unitronicsvision570
unitronicsvision560 firmware
unitronicsvision560
unitronicsvision430 firmware
unitronicsvision430

and 21 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • unitronics samba 3.5 firmwarebefore 12.38
  • unitronics samba 4.3 firmwarebefore 12.38
  • unitronics samba 7 firmwarebefore 12.38
  • unitronics visilogicbefore 9.9.00
  • unitronics vision1040 firmwarebefore 12.38
  • unitronics vision120 firmwarebefore 12.38
  • unitronics vision1210 firmwarebefore 12.38
  • unitronics vision130 firmwarebefore 12.38
  • unitronics vision230 firmwarebefore 12.38
  • unitronics vision280 firmwarebefore 12.38
  • unitronics vision290 firmwarebefore 12.38
  • unitronics vision350 firmwarebefore 12.38
  • unitronics vision430 firmwarebefore 12.38
  • unitronics vision530 firmwarebefore 12.38
  • unitronics vision560 firmwarebefore 12.38
  • unitronics vision570 firmwarebefore 12.38
  • unitronics vision700 firmwarebefore 12.38

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisa-cg). Independent of NVD's CPE analysis and usually ahead of it.

  • Unitronics VisiLogic

    • before 9.9.00affected

Same product

unitronics: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-2003Embedded malicious code vulnerability in Unitronics Vision1210
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+5 d
  3. TodaySep 30, 2026+1030 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-1188 · Initialization of a Resource with an Insecure Default

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records