When Core-Network Elements Become Reachable: Field-Level Exploitability Analysis in Diameter

The increasing exposure of cellular core-network elements to public networks has turned Diameter signaling interfaces into a practical attack surface. While large language models LLMs show promise for protocol exploitability analysis, we find that their judgments on Diameter can be unreliable...

sigcorr

SigCorr Passive Cross-Protocol Attack Detection for Mobile Core Networks SigCorr is the first open-source tool to detect cross-protocol attack chains spanning SS7/MAP, Diameter S6a, and GTPv2-C through unified subscriber identity correlation. Features Cross-protocol correlation — Links SS7/MAP,...

EUVD-2026-64674

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156: Heap-based Buffer Overflow

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156 Open5GS S6a Authentication-Information-Request hss-s6a-path.c hss_ogs_diam_s6a_air_cb heap-based overflow

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156 Open5GS S6a Authentication-Information-Request hss-s6a-path.c hss_ogs_diam_s6a_air_cb heap-based overflow

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156 Open5GS S6a Authentication-Information-Request hss-s6a-path.c hss_ogs_diam_s6a_air_cb heap-based overflow

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hssogsdiams6aaircb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer...

CVE-2026-78156

A heap-based buffer overflow exists in Open5GS 2.8.0 , specifically in the function hss_ogs_diam_s6a_air_cb within the file src/hss/hss-s6a-path.c, which implements the S6a Authentication-Information-Request Handler . The flaw is triggered by manipulation of the Visited-PLMN-Id argument, enabling...

PT-2026-79791

A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hss ogs diam s6a air cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based...

EUVD-2024-55715

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043: Heap-based Buffer Overflow

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043

Open5GS contains a vulnerability (CVE-2024-14043) in the Diameter S6a interface. The flaw resides in the mme_s6a_subscription_data_from_avp function (src/mme/mme-fd-path.c), where manipulating the msisdn_len argument can trigger a heap-based buffer overflow. This can be exploited remotely over th...

CVE-2024-14043 Open5GS Diameter S6a mme-fd-path.c mme_s6a_subscription_data_from_avp heap-based overflow

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043 Open5GS Diameter S6a mme-fd-path.c mme_s6a_subscription_data_from_avp heap-based overflow

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...

CVE-2024-14043 Open5GS Diameter S6a mme-fd-path.c mme_s6a_subscription_data_from_avp heap-based overflow

A vulnerability was determined in Open5GS up to 2.7.1. This vulnerability affects the function mmes6asubscriptiondatafromavp of the file src/mme/mme-fd-path.c of the component Diameter S6a Interface. Executing a manipulation of the argument msisdnlen can lead to heap-based buffer overflow. It is...