CVE-2026-15720
HighCVSS 8.6Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
In Open5GS up to version 2.7.7, a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service.
Risk Assessment
An unauthenticated remote attacker can crash the 5G core network, causing service disruption for all subscribers.
Recommendation
Update Open5GS to a version newer than 2.7.7 as soon as a patch is released by the vendor.
Other vulnerabilities in Open5GS
See all- CVE-2026-30045Unknown
An integer overflow in the /nnrf-disc/v1/nf-instances component of open5gs v2.7.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted HTTP/2 GET request.
- CVE-2026-37198High
An integer overflow in the SMF component of Open5GS v2.7.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted GTP packet.
- CVE-2026-30047High
A reachable assertion vulnerability in the /nsmf-pdusession/v1/sm-contexts component of Open5GS v2.7.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted DELETE request.
- CVE-2026-30046High
A reachable assertion vulnerability in the NUDM-UECM interface of Open5GS v2.7.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted DELETE request.
- CVE-2026-78186Medium
A flaw was found in Open5GS up to version 2.8.0 in an unknown function of src/hss/hss-cx-path.c in the HSS component. Manipulation of the User-Name argument causes a reachable assertion. The attack can be carried out remotely, and the exploit has been published.
- CVE-2026-78158Medium
A flaw has been found in Open5GS 2.8.0 in the unknown code of the AMF UEContextReleaseRequest Path Handler component. Executing a manipulation can lead to improper authorization. The attack can be launched remotely.
- CVE-2026-78157High
A vulnerability was detected in Open5GS 2.8.0 in the pcrf_rx_aar_cb function of src/pcrf/pcrf-rx-path.c in the Rx AA-Request Handler component. Manipulation leads to an out-of-bounds read. The attack can be initiated remotely.
- CVE-2026-78156High
A security vulnerability was detected in Open5GS 2.8.0 in the hss_ogs_diam_s6a_air_cb function of src/hss/hss-s6a-path.c in the S6a Authentication-Information-Request Handler component. Manipulation of the Visited-PLMN-Id argument leads to a heap-based buffer overflow. The attack may be performed remotely.
- CVE-2026-71676High
Buffer overflow vulnerability in Open5GS v.2.7.0 allows a remote attacker to cause a denial of service via the NAS 5GS decoder chain, triggered when the message type byte of a NAS PDU is mutated.
- CVE-2026-71675High
An issue in Open5GS v.2.7.0 allows a remote attacker to cause a denial of service via the ngap_send_to_nas() function in src/amf/ngap-path.c.
Original NVD description (English source)
In Open5GS through version 2.7.7 a pre-authentication heap out-of-bounds read in the AMF NAS 5GS mobile-identity handler may result in subscriber-wide denial of service.