CVE-2026-1682Public exploitNetwork attack vectorHinoki check available

Remote process crash via missing PFCP NodeID

Published Jan 30, 2026 · Updated Jan 30, 2026

NULL pointer dereference in free5GC SMF 4.0 and 4.1.0 allows remote attackers to crash the process via a malformed PFCP request. HandlePfcpAssociationReleaseRequest dereferences the request's NodeID before checking whether the mandatory information element is present, and the unrecovered panic terminates SMF. Exploitation requires UDP reachability to the PFCP endpoint, normally from the UPF network path, and causes a service interruption rather than data disclosure or modification.

CVSS severity5.3
Medium
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

NULL pointer dereference in free5GC SMF 4.0 and 4.1.0 allows remote attackers to crash the process via a malformed PFCP request. HandlePfcpAssociationReleaseRequest dereferences the request's NodeID before checking whether the mandatory information element is present, and the unrecovered panic terminates SMF. Exploitation requires UDP reachability to the PFCP endpoint, normally from the UPF network path, and causes a service interruption rather than data disclosure or modification.

The record

CVE
CVE-2026-1682
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
free5GC
Product
SMF
Classifications
CWE-476, CWE-404, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0
  2. Affected versionversion=4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

free5GC · SMFversion=4.0; version=4.1.0

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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