Festo MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L4-AGD inclusion of undocumented features or chicken bits

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Festo MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L4-AGD, MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L5-AGD, MSE6-C2M-5000-FB43-D-M-RG-BAR-M12L4-MQ1-AGD, MSE6-C2M-5000-FB43-D-M-RG-BAR-M12L5-MQ1-AGD, MSE6-C2M-5000-FB44-D-M-RG-BAR-AMI-AGD, MSE6-C2M-5000-FB44-D-RG-BAR-AMI-AGD, MSE6-D2M-5000-CBUS-S-RG-BAR-VCB-AGD, MSE6-E2M-5000-FB13-AGD, MSE6-E2M-5000-FB36-AGD, MSE6-E2M-5000-FB37-AGD, MSE6-E2M-5000-FB43-AGD and MSE6-E2M-5000-FB44-AGD and classified as very critical. Impacted is an unknown function. The manipulation leads to inclusion of undocumented features or chicken bits. This vulnerability is uniquely identified as CVE-2023-3634. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Festo MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L4-AGD, MSE6-C2M-5000-FB36-D-M-RG-BAR-M12L5-AGD, MSE6-C2M-5000-FB43-D-M-RG-BAR-M12L4-MQ1-AGD, MSE6-C2M-5000-FB43-D-M-RG-BAR-M12L5-MQ1-AGD, MSE6-C2M-5000-FB44-D-M-RG-BAR-AMI-AGD, MSE6-C2M-5000-FB44-D-RG-BAR-AMI-AGD, MSE6-D2M-5000-CBUS-S-RG-BAR-VCB-AGD, MSE6-E2M-5000-FB13-AGD, MSE6-E2M-5000-FB36-AGD, MSE6-E2M-5000-FB37-AGD, MSE6-E2M-5000-FB43-AGD and MSE6-E2M-5000-FB44-AGD. It has been rated as very critical. This issue affects an unknown part. The manipulation with an unknown input leads to a inclusion of undocumented features or chicken bits vulnerability. Using CWE to declare the problem leads to CWE-1242. The device includes chicken bits or undocumented features that can create entry points for unauthorized actors. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In products of the MSE6 product-family by Festo a remote authenticated, low privileged attacker could use functions of undocumented test mode which could lead to a complete loss of confidentiality, integrity and availability.

The advisory is shared at certvde.com. The identification of this vulnerability is CVE-2023-3634 since 07/12/2023. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-44280). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 8.8
VulDB Temp Score: 8.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (CERTVDE): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Inclusion of undocumented features or chicken bits
CWE: CWE-1242 / CWE-912
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/12/2023 CVE reserved
04/16/2026 +1009 days Advisory disclosed
04/16/2026 +0 days VulDB entry created
04/16/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: VDE-2023-020
Status: Not defined

CVE: CVE-2023-3634 (🔒)
GCVE (CVE): GCVE-0-2023-3634
GCVE (VulDB): GCVE-100-357857
EUVD: 🔒

Entryinfo

Created: 04/16/2026 07:26
Updated: 04/16/2026 09:03
Changes: 04/16/2026 07:26 (60), 04/16/2026 09:03 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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