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A security vulnerability has been detected in Open5GS up to 2.7.6. Impacted is an unknown function of the file /src/mme/esm-build.c of the component MME. The manipulation leads to memory corruption. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

CVE-2026-2522 is a memory corruption vulnerability identified in Open5GS, an open-source 5G core network implementation widely used for mobile network infrastructure and private 5G deployments. The vulnerability resides in an unspecified function within the /src/mme/esm-build.c source file of the Mobility Management Entity (MME) component, which is responsible for managing signaling and session management in the 5G core network. The flaw allows remote attackers to manipulate input data to cause memory corruption, potentially leading to denial of service or arbitrary code execution. The vulnerability requires no authentication or user interaction, making it remotely exploitable over the network. The CVSS 4.0 base score is 6.9 (medium severity), reflecting the ease of exploitation and potential impact on availability and integrity, though confidentiality is not affected. The vulnerability was responsibly disclosed but remains unpatched as of the publication date, with no official response from the Open5GS project. No known exploits in the wild have been reported yet, but public proof-of-concept code exists, increasing the risk of exploitation. Given the critical role of the MME in 5G network operation, exploitation could disrupt mobile network services or allow attackers to execute arbitrary code within the network infrastructure. This poses a significant risk to telecom operators and enterprises relying on Open5GS for 5G core network functions.

Detailed information about CVE-2026-2522: Memory Corruption in Open5GS affecting null Open5GS. Get real-time updates, technical details, and mitigation strategi

CVE-2026-2522: Memory Corruption in Open5GS - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-2522: Memory Corruption in Open5GS

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