How severe is CVE-2023-27855?

CVE-2023-27855 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-27855 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27855?

CVE-2023-27855 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-2023-27855?

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

When was CVE-2023-27855 published?

CVE-2023-27855 was published on 2023-03-22 and last updated on 2026-06-17.

CVE-2023-27855

CVE-2023-27855 is a critical-severity vulnerability in Rockwellautomation Thinmanager with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 13% (96th 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, a path traversal exists when processing a message in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker could potentially exploit this vulnerability to upload arbitrary files to any directory on the disk drive where ThinServer.exe is installed. The attacker could overwrite existing executable files with attacker-controlled, malicious contents, potentially causing remote code execution.

Frequently asked questions

What is CVE-2023-27855?: In affected versions, a path traversal exists when processing a message in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker could potentially exploit this vulnerability to upload arbitrary files to any directory on the disk drive where ThinServer.exe is installed. The attacker could overwrite existing executable files with attacker-controlled, malicious contents, potentially causing remote code execution.
How severe is CVE-2023-27855?: CVE-2023-27855 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-27855 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27855?: CVE-2023-27855 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-2023-27855?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-27855 published?: CVE-2023-27855 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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