CVE-2023-27857

Q: How do I fix CVE-2023-27857?

Upgrade thinmanager to 12.1.4 or later.

Q: Is CVE-2023-27857 being actively exploited?

Not that we know of. CVE-2023-27857 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 18.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.

Q: How severe is CVE-2023-27857?

CVE-2023-27857 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2023-27857 affect?

Published advisories record a fix for thinmanager (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 97th pctl

7.5

CVSS v3

NVD

Description

In affected versions, a heap-based buffer over-read condition occurs when the message field indicates more data than is present in the message field in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker can exploit this vulnerability to crash ThinServer.exe due to a read access violation.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

thinmanagerNVD

Affected:>= 12.1.0, < 12.1.4Fixed in:12.1.4CVE-2023-27857derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

18.34%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Vendor Advisory1

rockwellautomation.custhelp.com

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2023-21769	High	7.5	89%	-	Fix

Common questions

How do I fix CVE-2023-27857?

Upgrade thinmanager to 12.1.4 or later.

Is CVE-2023-27857 being actively exploited?

Not that we know of. CVE-2023-27857 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 18.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 97% of all scored CVEs.

How severe is CVE-2023-27857?

CVE-2023-27857 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-27857 affect?

Published advisories record a fix for thinmanager (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.