CVE-2025-5501Public exploitNetwork attack vector

AMF crash via omitted repeated-path-switch N2 response

Published Jun 3, 2025 · Updated Jun 3, 2025

Reachable assertion in Open5GS 2.7.0 through 2.7.3 allows remote attackers to crash the AMF by repeating an NGAP PathSwitchRequest. When unchanged tunnel data is repeated, ngap_handle_path_switch_request_transfer returns HTTP 204 without the N2 acknowledgement data expected by the AMF SM-context state machine. A connected UE and gNB must complete one path switch and repeat the request; the second response reaches ogs_assert_if_reached and aborts the AMF process.

CVSS severity6.9
Medium
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Reachable assertion in Open5GS 2.7.0 through 2.7.3 allows remote attackers to crash the AMF by repeating an NGAP PathSwitchRequest. When unchanged tunnel data is repeated, ngap_handle_path_switch_request_transfer returns HTTP 204 without the N2 acknowledgement data expected by the AMF SM-context state machine. A connected UE and gNB must complete one path switch and repeat the request; the second response reaches ogs_assert_if_reached and aborts the AMF process.

The record

CVE
CVE-2025-5501
Published
Jun 3, 2025
Updated
Jun 3, 2025
Vendor
Open5GS
Product
Open5GS
Classifications
CWE-617, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=2.7.0
  2. Affected versionversion=2.7.1
  3. Affected versionversion=2.7.2
  4. Affected versionversion=2.7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open5GS · Open5GSversion=2.7.0; version=2.7.1; version=2.7.2; version=2.7.3

Published CVSS scores

5.0VulDB CNAAV:N/AC:L/Au:N/C:N/I:N/A:P
6.9VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo