How severe is CVE-2023-27856?

CVE-2023-27856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-27856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 76% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27856?

CVE-2023-27856 primarily affects Rockwellautomation Thinmanager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-27856?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-27856 published?

CVE-2023-27856 was published on 2023-03-22 and last updated on 2026-06-17.

CVE-2023-27856

CVE-2023-27856 is a high-severity vulnerability in Rockwellautomation Thinmanager with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 76% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 76% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Rockwellautomation Thinmanager
Published: 2023-03-22
Last modified: 2026-06-17

Description

In affected versions, path traversal exists when processing a message of type 8 in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to download arbitrary files on the disk drive where ThinServer.exe is installed.

Frequently asked questions

What is CVE-2023-27856?: In affected versions, path traversal exists when processing a message of type 8 in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to download arbitrary files on the disk drive where ThinServer.exe is installed.
How severe is CVE-2023-27856?: CVE-2023-27856 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-27856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 76% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27856?: CVE-2023-27856 primarily affects Rockwellautomation Thinmanager. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-27856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-27856 published?: CVE-2023-27856 was published on 2023-03-22 and last updated on 2026-06-17.

References

https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138640

Affected products (3)

cpe:2.3:a:rockwellautomation:thinmanager:*:*:*:*:*:*:*:*
cpe:2.3:a:rockwellautomation:thinmanager:13.0.0:*:*:*:*:*:*:*
cpe:2.3:a:rockwellautomation:thinmanager:13.0.1:*:*:*:*:*:*:*

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