INSTAR 2K+/4K 3.11.1 Build 1124 Backend IPC Server denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in INSTAR 2K+ and 4K 3.11.1 Build 1124. It has been declared as critical. The affected element is an unknown function of the component Backend IPC Server. Executing a manipulation can lead to denial of service. The identification of this vulnerability is CVE-2025-8761. The attack may be launched remotely. Furthermore, there is an exploit available. The application of restrictive firewalling is recommended.

Detailsinfo

A vulnerability has been found in INSTAR 2K+ and 4K 3.11.1 Build 1124 and classified as critical. This vulnerability affects some unknown processing of the component Backend IPC Server. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was shared by Michael Imfeld with modzero AG as MZ-25-03. The advisory is shared for download at modzero.com. This vulnerability was named CVE-2025-8761. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

A public exploit has been developed by Michael Imfeld. It is possible to download the exploit at modzero.com. It is declared as proof-of-concept.

Proper firewalling of is able to address this issue.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-24543). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.5
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Author: Michael Imfeld
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔒

Timelineinfo

08/13/2025 Advisory disclosed
08/13/2025 +0 days VulDB entry created
08/13/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: MZ-25-03
Researcher: Michael Imfeld
Organization: modzero AG
Status: Not defined

CVE: CVE-2025-8761 (🔒)
GCVE (CVE): GCVE-0-2025-8761
GCVE (VulDB): GCVE-100-319864
EUVD: 🔒

Entryinfo

Created: 08/13/2025 08:16
Updated: 08/13/2025 09:44
Changes: 08/13/2025 08:16 (56), 08/13/2025 08:18 (4), 08/13/2025 09:21 (1), 08/13/2025 09:44 (31)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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