CVE-2023-6448 | Unitronics VisiLogic uses a default administrative password

Exp

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.

Published: 2023-12-05 Last update: 2026-02-26 Assigner: 9119a7d8-5eab-497f-8521-727c672e3725 Source: 9119a7d8-5eab-497f-8521-727c672e3725
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-6448 is rated Critical Active Threat (100/100): CVSS Critical severity, with high exploitation likelihood (EPSS 13.29%, 94th percentile). CISA KEV confirms active exploitation (added 2023-12-11) affecting Unitronics / Vision PLC and HMI. a weakness (CWE-1188) Unauthenticated remote administrative access may be possible. EPSS rose +3.03% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-6448

Name: Unitronics Vision PLC and HMI Insecure Default Password Vulnerability · CISA KEV detail

Exploit added: 2023-12-11

Action due: 2023-12-18

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Exploit prediction scoring system (EPSS) score for CVE-2023-6448

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-23 10.26% 13.29% +3.03%
2 2025-11-21 20.43% 10.26% -10.17%
3 2025-11-18 — 20.43% —

Full EPSS history (27 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-6448

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 9119a7d8-5eab-497f-8521-727c672e3725
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-6448

Affected software / configurations for CVE-2023-6448

Vendor Product Version Raw CPE
unitronics vision1210_firmware < 12.38 cpe:2.3:o:unitronics:vision1210_firmware:*:*:*:*:*:*:*:*
unitronics vision1040_firmware < 12.38 cpe:2.3:o:unitronics:vision1040_firmware:*:*:*:*:*:*:*:*
unitronics vision700_firmware < 12.38 cpe:2.3:o:unitronics:vision700_firmware:*:*:*:*:*:*:*:*
unitronics vision570_firmware < 12.38 cpe:2.3:o:unitronics:vision570_firmware:*:*:*:*:*:*:*:*
unitronics vision560_firmware < 12.38 cpe:2.3:o:unitronics:vision560_firmware:*:*:*:*:*:*:*:*
unitronics vision430_firmware < 12.38 cpe:2.3:o:unitronics:vision430_firmware:*:*:*:*:*:*:*:*
unitronics vision350_firmware < 12.38 cpe:2.3:o:unitronics:vision350_firmware:*:*:*:*:*:*:*:*
unitronics vision130_firmware < 12.38 cpe:2.3:o:unitronics:vision130_firmware:*:*:*:*:*:*:*:*
unitronics vision230_firmware < 12.38 cpe:2.3:o:unitronics:vision230_firmware:*:*:*:*:*:*:*:*
unitronics vision280_firmware < 12.38 cpe:2.3:o:unitronics:vision280_firmware:*:*:*:*:*:*:*:*
unitronics vision290_firmware < 12.38 cpe:2.3:o:unitronics:vision290_firmware:*:*:*:*:*:*:*:*
unitronics vision530_firmware < 12.38 cpe:2.3:o:unitronics:vision530_firmware:*:*:*:*:*:*:*:*
unitronics vision120_firmware < 12.38 cpe:2.3:o:unitronics:vision120_firmware:*:*:*:*:*:*:*:*
unitronics visilogic < 9.9.00 cpe:2.3:a:unitronics:visilogic:*:*:*:*:*:*:*:*
unitronics samba_3.5_firmware < 12.38 cpe:2.3:o:unitronics:samba_3.5_firmware:*:*:*:*:*:*:*:*
unitronics samba_4.3_firmware < 12.38 cpe:2.3:o:unitronics:samba_4.3_firmware:*:*:*:*:*:*:*:*
unitronics samba_7_firmware < 12.38 cpe:2.3:o:unitronics:samba_7_firmware:*:*:*:*:*:*:*:*

References for CVE-2023-6448

cvelogic Threat Intelligence