CVE-2025-15555 - Vulnerability Details

- Open5GS VoLTE Cx-Test hss-cx-path.c hss_ogs_diam_cx_mar_cb stack-based overflow

Description

A security flaw has been discovered in Open5GS up to 2.7.6. Affected by this vulnerability is the function hss_ogs_diam_cx_mar_cb of the file src/hss/hss-cx-path.c of the component VoLTE Cx-Test. The manipulation of the argument OGS_KEY_LEN results in stack-based buffer overflow. The attack may be launched remotely. The patch is identified as 54dda041211098730221d0ae20a2f9f9173e7a21. A patch should be applied to remediate this issue.

Published: 2026-02-04

Score: 6.9 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The vulnerability is a stack‑based buffer overflow located in the hss_ogs_diam_cx_mar_cb function of the VoLTE Cx‑Test component. By manipulating the OGS_KEY_LEN argument, an attacker can overflow the stack, corrupting control data and enabling execution of arbitrary code or denial of service. This exploit can compromise confidentiality, integrity, and availability of the affected service.

Affected Systems

All installations of Open5GS up to and including version 2.7.6 that deploy the VoLTE Cx‑Test component are impacted. The flaw resides in src/hss/hss‑cx‑path.c and applies to any deployment using the default configuration of Open5GS, with no further platform restrictions noted.

Risk and Exploitability

The CVSS score of 6.9 denotes medium severity. EPSS is reported as less than 1 %, indicating a very low likelihood of active exploitation at this time. The vulnerability is not listed in the CISA KEV catalog. Based on the description, exploitation can be carried out remotely, likely via crafted Diameter requests to the HSS interface.*

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

Open5GS

affected

Version	Status	Constraints
`2.7.0`	affected	—
`2.7.1`	affected	—
`2.7.2`	affected	—
`2.7.3`	affected	—
`2.7.4`	affected	—
`2.7.5`	affected	—
`2.7.6`	affected	—

Configuration 1 [-]

cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

No data.

Vendor	Product	Confidence	Versions
Open5gs	Open5gs	—	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply the vendor patch identified by commit 54dda041211098730221d0ae20a2f9f9173e7a21, which updates Open5GS to a version beyond 2.7.6.
If the patch is not immediately available, upgrade to a newer Open5GS release that includes the fix, such as 2.7.7 or later.
As an interim measure, limit or disable access to the VoLTE Cx‑Test HSS interface until the patch can be applied to reduce exposure.

Generated by OpenCVE AI on April 22, 2026 at 20:05 UTC.

Tracking

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Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00056.

Exploitation poc

Automatable yes

Technical Impact partial

References

Link	Providers
https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/commit/54dda041211098730221d0ae20a2f9f9173e7a21
https://github.com/open5gs/open5gs/issues/4177
https://github.com/open5gs/open5gs/issues/4177#event-21256395700
https://vuldb.com/submit/741901
https://vuldb.com/vuln/343795
https://vuldb.com/vuln/343795/cti

History

Tue, 07 Apr 2026 18:00:00 +0000

Type	Values Removed	Values Added
References	https://vuldb.com/?ctiid.343795 https://vuldb.com/?id.343795 https://vuldb.com/?submit.741901	https://vuldb.com/submit/741901 https://vuldb.com/vuln/343795 https://vuldb.com/vuln/343795/cti

Wed, 11 Feb 2026 19:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-787
CPEs		cpe:2.3:a:open5gs:open5gs::::::::

Thu, 05 Feb 2026 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 05 Feb 2026 11:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Open5gs Open5gs open5gs
Vendors & Products		Open5gs Open5gs open5gs

Wed, 04 Feb 2026 20:45:00 +0000

Type	Values Removed	Values Added
Description		A security flaw has been discovered in Open5GS up to 2.7.6. Affected by this vulnerability is the function hss_ogs_diam_cx_mar_cb of the file src/hss/hss-cx-path.c of the component VoLTE Cx-Test. The manipulation of the argument OGS_KEY_LEN results in stack-based buffer overflow. The attack may be launched remotely. The patch is identified as 54dda041211098730221d0ae20a2f9f9173e7a21. A patch should be applied to remediate this issue.
Title		Open5GS VoLTE Cx-Test hss-cx-path.c hss_ogs_diam_cx_mar_cb stack-based overflow
Weaknesses		CWE-119 CWE-121
References		https://github.com/open5gs/open5gs/ https://github.com/open5gs/open5gs/commit/54dda041211098730221d0ae20a2f9f9173e7a21 https://github.com/open5gs/open5gs/issues/4177 https://github.com/open5gs/open5gs/issues/4177#event-21256395700 https://vuldb.com/?ctiid.343795 https://vuldb.com/?id.343795 https://vuldb.com/?submit.741901
Metrics		cvssV2_0 `{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C'}` cvssV3_0 `{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C'}` cvssV3_1 `{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C'}` cvssV4_0 `{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X'}`

Subscriptions

Open5gs Open5gs

MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-02-04T20:32:07.223Z

Updated: 2026-04-07T15:49:09.962Z

Reserved: 2026-02-02T19:02:29.323Z

Link: CVE-2025-15555

Vulnrichment

Updated: 2026-02-05T21:04:29.190Z

NVD

Status : Modified

Published: 2026-02-04T21:15:57.380

Modified: 2026-04-07T16:16:22.347

Link: CVE-2025-15555

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-04-22T20:15:20Z

Weaknesses

CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121
Stack-based Buffer Overflow
CWE-787
Out-of-bounds Write

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

Exploitation poc

Automatable yes

Technical Impact partial

Subscriptions

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