{"id":86769,"date":"2026-03-25T00:43:20","date_gmt":"2026-03-25T00:43:20","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-8761-denial-of-service-vulnerability-in-instar-2k-and-4k-3-11-1-build-1124","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-8761-denial-of-service-vulnerability-in-instar-2k-and-4k-3-11-1-build-1124\/","title":{"rendered":"CVE-2025-8761: Denial of Service Vulnerability in INSTAR 2K+ and 4K 3.11.1 Build 1124<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

A critical vulnerability has been identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This vulnerability, known as CVE-2025-8761, affects the Backend IPC Server component of these products. If exploited, the vulnerability could potentially lead to a denial of service, thereby severely impacting system availability. Given the remote attack vector, the risk of exploitation is high, making it an issue of significant concern.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-8761
\nSeverity: High (CVSS: 7.5)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Denial of service, potential system compromise, or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

INSTAR 2K+ | 3.11.1 Build 1124
\nINSTAR 4K | 3.11.1 Build 1124<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability is due to an unspecified flaw in the Backend IPC Server of the affected products. An attacker could exploit this vulnerability by sending specially crafted packets to the targeted system. Successful exploitation could allow the attacker to cause a denial of service condition, potentially compromising the system or leading to data leakage.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of a malicious packet that could potentially exploit this vulnerability:<\/p>\n

POST \/IPCServer\/endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"malicious_payload\": \"Specially crafted packet causing DoS\" }<\/code><\/pre>\n
This is a conceptual example only. Actual exploitation techniques may vary based on the specifics of the vulnerability.
\nIt is highly recommended that affected users apply the vendor patch or use WAF\/IDS as a temporary mitigation measure until patches can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview A critical vulnerability has been identified in INSTAR 2K+ and 4K 3.11.1 Build 1124. This vulnerability, known as CVE-2025-8761, affects the Backend IPC Server component of these products. If exploited, the vulnerability could potentially lead to a denial of service, thereby severely impacting system availability. Given the remote attack vector, the risk of exploitation […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-86769","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t