Golem OEE MES path traversal allows file theft
CVE-2026-8464 in Neuron Soft Golem OEE MES enables unauthenticated attackers on local networks to read arbitrary server files via path traversal, patched in version 11.6.0.
Sourcecert.pl — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- No exploitation in the wild and no public exploit is recorded for the CVEs named.
CERT Polska disclosed CVE-2026-8464, an unauthenticated path traversal vulnerability in Neuron Soft's Golem OEE MES manufacturing execution system software. The flaw allows attackers positioned on the same local network to read arbitrary files from the underlying operating system by manipulating HTTP request paths, without requiring authentication.
The vulnerability was responsibly disclosed by security researcher Karol Królak of Securitum and coordinated through CERT Polska's disclosure process. Neuron Soft has addressed the issue in Golem OEE MES version 11.6.0. Organizations running affected versions should prioritize upgrading to mitigate the risk of unauthorized file access and potential exposure of sensitive configuration data or credentials.
While exploitation requires local network access, manufacturing environments often have extensive internal networks with limited segmentation, making this a significant risk for industrial operators using the affected MES platform.
Mentioned in this report
Detection guidance
Path Traversal Sequence in HTTP Request to Golem OEE MES
A behavioural hunt for the technique in general, not a signature for the CVEs this report names.
Detects HTTP requests containing directory traversal sequences (encoded or raw) that may indicate exploitation of CVE-2026-8464 against Golem OEE MES. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: Path Traversal Sequence in HTTP Request to Golem OEE MES
id: 8c6b8d80-fdd8-553b-88b0-9f3b29695918
status: experimental
description: Detects HTTP requests containing directory traversal sequences (raw or
URL-encoded) targeting a Golem OEE MES web application, consistent with exploitation
of CVE-2026-8464 unauthenticated path traversal.
references:
- CERT Polska CVE-2026-8464 advisory
logsource:
category: webserver
product: null
detection:
selection:
cs-uri-query|contains:
- ../
- ..\\
- '%2e%2e%2f'
- '%2e%2e/'
- ..%2f
- '%2e%2e%5c'
- ..%5c
filter:
cs-uri-query|contains:
- /api/docs
- /static/../
condition: selection and not filter
falsepositives:
- Legitimate application paths that reference relative navigation in static asset
URLs
- Vulnerability scanners performing authorized penetration tests
level: high
tags:
- attack.t1190
- attack.t1083
author: Vorant
HTTP Request for Sensitive OS Files via Traversal on MES Web Server
A behavioural hunt for the technique in general, not a signature for the CVEs this report names.
Detects HTTP requests attempting to access common sensitive OS configuration or credential files, indicative of file theft following path traversal exploitation. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: HTTP Request for Sensitive OS Files via Traversal on MES Web Server
id: 27b2dde0-27ed-5bd6-ba6b-816cf6aa7f33
status: experimental
description: Detects HTTP requests referencing sensitive OS files (passwd, shadow,
win.ini, SAM, config files) reached via directory traversal against a manufacturing
execution system web interface, consistent with post-exploitation file theft after
CVE-2026-8464.
references:
- CERT Polska CVE-2026-8464 advisory
logsource:
category: webserver
product: null
detection:
selection_traversal:
cs-uri-query|contains:
- ../
- ..%2f
- '%2e%2e%2f'
selection_target:
cs-uri-query|contains:
- /etc/passwd
- /etc/shadow
- win.ini
- boot.ini
- /windows/system32/config
- web.config
- .env
condition: selection_traversal and selection_target
falsepositives:
- Authorized security assessments or vulnerability scans against the MES platform
- Automated backup or configuration audit tools that reference similarly named files
level: high
tags:
- attack.t1083
- attack.t1190
author: Vorant
Repeated Distinct Path Traversal Requests Against Single MES Host
A behavioural hunt for the technique in general, not a signature for the CVEs this report names.
Detects a pattern of multiple distinct traversal-style URIs from the same source targeting one server, suggesting enumeration/exfiltration of arbitrary files via unauthenticated path traversal. Auto-generated starting point — validate and tune in your environment before deploying. IOC matches can false-positive on shared infrastructure and decay as adversary infrastructure rotates.
title: Repeated Distinct Path Traversal Requests Against Single MES Host
id: d5757a25-2d3c-58f1-8236-3cc8f666049d
status: experimental
description: Detects source IPs issuing multiple distinct HTTP requests containing
directory traversal sequences against the same web server, indicating systematic
exploitation of an unauthenticated path traversal vulnerability such as CVE-2026-8464
to enumerate and steal files. Consider tuning the volume threshold to your environment;
this rule flags any occurrence and should be correlated over time in the SIEM for
repeated activity from the same source.
references:
- CERT Polska CVE-2026-8464 advisory
logsource:
category: webserver
product: null
detection:
selection:
cs-uri-query|contains:
- ../
- ..%2f
- '%2e%2e%2f'
cs-method: GET
condition: selection
falsepositives:
- Internal vulnerability scanning tools performing authorized assessments
- Misconfigured application clients generating malformed relative URLs
level: medium
tags:
- attack.t1190
- attack.t1083
author: Vorant
Behavioural rules are generated from public reporting — validate in your environment before deploying.
Source reporting: https://cert.pl/en/posts/2026/06/CVE-2026-8464/
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