CVE-2026-78158Public exploitNetwork attack vector

Targeted UE disconnect via cross-association release request

Published Aug 24, 2026 · Updated Aug 24, 2026

Improper authorization in Open5GS AMF 2.8.0 allows remote authenticated users to interrupt a UE session through an N2 request. The UEContextReleaseRequest handler looks up a UE globally by its NGAP identifier pair without verifying that the sending gNB association owns that context. An N2-side peer that establishes a separate SCTP/NGAP association and obtains or reuses active UE identifiers can force a targeted disconnect without crashing the AMF or exposing subscriber data.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Improper authorization in Open5GS AMF 2.8.0 allows remote authenticated users to interrupt a UE session through an N2 request. The UEContextReleaseRequest handler looks up a UE globally by its NGAP identifier pair without verifying that the sending gNB association owns that context. An N2-side peer that establishes a separate SCTP/NGAP association and obtains or reuses active UE identifiers can force a targeted disconnect without crashing the AMF or exposing subscriber data.

The record

CVE
CVE-2026-78158
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
Open5GS
Product
Open5GS
Classifications
CWE-266, CWE-285, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 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=2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open5GS · Open5GSversion=2.8.0

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
6.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-285Improper Authorization
T1499.004Application or System Exploitation

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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