CVE-2023-6448
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.
- CVSS
- 9.8Criticalscored by the publisher (CNA)
- Exploited in the wild
- Yes, in CISA KEV since 11 Dec 2023CISA deadline for US federal agencies: 18 Dec 2023
- EPSS
- 2.1%chance of exploitation in the next 30 daystop 19% of scored CVEsFIRST score of 11 Nov 2026
- Fix
- Patch availablesee the advisories in the references
- Published
- 5 Dec 2023analysed here 12 Nov 2026
Do first. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. (CISA's required action for this KEV entry)
Summary
Triage
- Attack surface
- Server-side
- Exploitable
- Configuration or build time
- Attack vector
- network
The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.
Affected products
| Product | Affected versions | Vendor says fixed in |
|---|---|---|
| Unitronics VisiLogic | < 9.9.00Vendor says fixed in: not stated |
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.
Products named in our analysis
- unitronics:vision1210_firmware
- unitronics:vision1040_firmware
- unitronics:vision700_firmware
- unitronics:vision570_firmware
- unitronics:vision560_firmware
- unitronics:vision430_firmware
- unitronics:vision350_firmware
- unitronics:vision130_firmware
- unitronics:vision230_firmware
- unitronics:vision280_firmware
- unitronics:vision290_firmware
- unitronics:vision530_firmware
- unitronics:vision120_firmware
- unitronics:visilogic
- unitronics:samba_3.5_firmware
- unitronics:samba_4.3_firmware
- unitronics:samba_7_firmware
Fix and mitigation
WAF and other mitigations
Can a WAF block it? No. The attacker exploits a default administrative password over the network, but the description does not specify that this happens via HTTP or a web interface. Since the attack involves network access but not necessarily HTTP, a web application firewall cannot filter the attack.
Also consider: patch · rotate
Based on an AI reading of the CVE description, and no vendor rule found yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.
Remediation steps (AI-written)
Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.
Exploitation evidence
- CISA KEV catalog
- Listed since 11 Dec 2023.
- CISA due date
- 18 Dec 2023, the remediation deadline for US federal agencies
- CISA required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Public exploit code
- None on record in Exploit-DB, Metasploit, Nuclei templates or PoC-in-GitHub.
- CISA SSVC
- exploitation active, automatable yes, technical impact totalAssessed by CISA 6 Dec 2023 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.
Timeline
- 5 Dec 2023Published
- 6 Dec 2023CISA SSVC assessment: exploitation active1 day later
- 11 Dec 2023Added to CISA KEV (exploited in the wild)4 days later
- 18 Dec 2023CISA remediation due date (US federal agencies)7 days later
- 21 Oct 2025CVE record last updated674 days (about 2 years) later
- 12 Nov 2026Analysed by vulneraibility.com387 days (about 1 year) later
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Metric | Value | What it means |
|---|---|---|
| Attack vector | NetworkReachable over the internet or any routable network. | Reachable over the internet or any routable network. |
| Attack complexity | LowRepeatable attack, no special conditions. | Repeatable attack, no special conditions. |
| Privileges required | NoneThe attacker needs no prior access. | The attacker needs no prior access. |
| User interaction | NoneNo victim action needed. | No victim action needed. |
| Scope | UnchangedImpact stays within the vulnerable component. | Impact stays within the vulnerable component. |
| Confidentiality | HighTotal data disclosure possible. | Total data disclosure possible. |
| Integrity | HighComplete modification possible. | Complete modification possible. |
| Availability | HighFull outage possible. | Full outage possible. |
Common questions
Is CVE-2023-6448 being exploited?
Yes. CVE-2023-6448 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2023-6448?
CVE-2023-6448 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2023-6448?
Yes. A fix has been recorded for CVE-2023-6448. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2023-6448 affect?
CVE-2023-6448 affects unitronics:vision1210_firmware, unitronics:vision1040_firmware, unitronics:vision700_firmware, unitronics:vision570_firmware, and 13 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
References
5 references in the CVE record, grouped by the tags the record gives them.
Advisories (1)
- downloads.unitronicsplc.com /Sites/plc/Technical_Library/Unitronics-Cybersecurity-Advisory-2023-001-CVE-2023
Other links (4)
- cisa.gov /news-events/alerts/2023/11/28/exploitation-unitronics-plcs-used-water-and-waste
- unitronicsplc.com /cyber_security_vision-samba/
- downloads.unitronicsplc.com /Sites/plc/Visilogic/Version_Changes-Bug_Reports/VisiLogic%209.9.00%20Version%20
- cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6448
Where the data on this page comes from
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- CISA KEV catalog: exploitation, date added, due date
- CISA Vulnrichment (ADP): SSVC decision points
- FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.
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