CVE-2025-55904Public exploit

Service crash via empty multipart body

Published Sep 17, 2025 · Updated Sep 17, 2025

NULL pointer dereference in Open5GS 2.7.5 allows local users to crash an SBI service via an empty multipart/related HTTP POST body. The parse_multipart function in lib/sbi/message.c reads http->content[0] without checking whether an empty request left http->content as NULL. The request must reach an SBI HTTP/2 endpoint; successful exploitation segfaults the targeted AMF, AUSF, BSF, NRF, NSSF, PCF, SMF, UDM, or UDR process.

CVSS severity4.0
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Open5GS 2.7.5 allows local users to crash an SBI service via an empty multipart/related HTTP POST body. The parse_multipart function in lib/sbi/message.c reads http->content[0] without checking whether an empty request left http->content as NULL. The request must reach an SBI HTTP/2 endpoint; successful exploitation segfaults the targeted AMF, AUSF, BSF, NRF, NSSF, PCF, SMF, UDM, or UDR process.

The record

CVE
CVE-2025-55904
Published
Sep 17, 2025
Updated
Sep 17, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.0CISA-ADPCVSS:3.1/AV:L/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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