Is CVE-2026-44328 actively exploited?

No active exploitation of CVE-2026-44328 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-44328 be exploited remotely?

Yes. CVE-2026-44328 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-44328?

CVE-2026-44328 has a CVSS score of 8.2 (HIGH).

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HIGH

CVE-2026-44328

CWE-306Published: May 27, 2026· Updated: May 28, 2026

8.2

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.9th

Official Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unconditionally dereferences upNode.UPF after the type-guarded async release, even though AN-typed nodes are constructed without a UPF object. As a result, a single unauthenticated DELETE /upi/v1/upNodesLinks/gNB1 request crashes the handler with a nil-pointer panic AND mutates the in-memory user-plane topology before panicking (the UpNodeDelete(upNodeRef) line runs first). This is an unauthenticated, state-mutating panic-DoS sink that an off-path network attacker can trigger by name against any AN entry. This vulnerability is fixed in 4.2.2.

NVD Source

Technical Analysis

CVE-2026-44328 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 8.2.