Vulnerability-Lookup

GHSA-CFH6-R6WV-JF9H

Vulnerability from github – Published: 2026-08-12 06:30 – Updated: 2026-08-12 06:30

Details

A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

2.1 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

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{
  "affected": [],
  "aliases": [
    "CVE-2025-15687"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-404"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T04:17:38Z",
    "severity": "LOW"
  },
  "details": "A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.",
  "id": "GHSA-cfh6-r6wv-jf9h",
  "modified": "2026-08-12T06:30:48Z",
  "published": "2026-08-12T06:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15687"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/issues/4027"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/pull/4034"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/commit/f23d7a5e959acd8f37b925dc29b85f26b7d391cb"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs"
    },
    {
      "type": "WEB",
      "url": "https://github.com/open5gs/open5gs/releases/tag/v2.7.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/user-attachments/files/21515527/SMF.crashes.zip"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2025-15687"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/867119"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/387283"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/387283/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2025-15687 (GCVE-0-2025-15687)

Vulnerability from cvelistv5 – Published: 2026-08-12 02:45 – Updated: 2026-08-12 12:35 X_Open Source

Title

Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service

Summary

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 12:35 UTC

CWE

CWE-404 - Denial of Service

Assigner

VulDB mitre root

References

10 references

URL	Tags
https://vuldb.com/vuln/387283	vdb-entrytechnical-description
https://vuldb.com/vuln/387283/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2025-15687	third-party-advisory
https://vuldb.com/submit/867119	third-party-advisory
https://github.com/open5gs/open5gs/issues/4027	issue-tracking
https://github.com/open5gs/open5gs/pull/4034	issue-trackingpatch
https://github.com/user-attachments/files/2151552…	exploit
https://github.com/open5gs/open5gs/commit/f23d7a5…	patch
https://github.com/open5gs/open5gs/releases/tag/v2.7.7	patch
https://github.com/open5gs/open5gs/	product

Impacted products

1 product

Vendor	Product	Version
n/a	Open5GS	Affected: 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 Unaffected: 2.7.7 cpe:2.3:a:open5gs:open5gs::::::::

Credits

WeiYi (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-15687",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T12:35:16.345281Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
          "dateUpdated": "2026-08-12T12:35:38.910Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "SMF Diameter Gx Credit-Control-Answer Handler"
          ],
          "product": "Open5GS",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.7.0"
            },
            {
              "status": "affected",
              "version": "2.7.1"
            },
            {
              "status": "affected",
              "version": "2.7.2"
            },
            {
              "status": "affected",
              "version": "2.7.3"
            },
            {
              "status": "affected",
              "version": "2.7.4"
            },
            {
              "status": "affected",
              "version": "2.7.5"
            },
            {
              "status": "affected",
              "version": "2.7.6"
            },
            {
              "status": "unaffected",
              "version": "2.7.7"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue. The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
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          }
        },
        {
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 4,
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C",
            "version": "2.0"
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        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "type": "CWE"
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      "providerMetadata": {
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        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-387283 | Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/387283"
        },
        {
          "name": "VDB-387283 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/387283/cti"
        },
        {
          "name": "CVE-2025-15687 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2025-15687"
        },
        {
          "name": "Submit #867119 | Open5GS v2.7.5 Denial of Service",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/867119"
        },
        {
          "tags": [
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          ],
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        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/open5gs/open5gs/pull/4034"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/user-attachments/files/21515527/SMF.crashes.zip"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/open5gs/open5gs/commit/f23d7a5e959acd8f37b925dc29b85f26b7d391cb"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/open5gs/open5gs/releases/tag/v2.7.7"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/open5gs/open5gs/"
        }
      ],
      "tags": [
        "x_open-source"
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          "time": "2026-08-09T00:00:00.000Z",
          "value": "Advisory disclosed"
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        {
          "lang": "en",
          "time": "2026-08-09T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-08-09T19:55:54.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service",
      "x_generator": [
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  "cveMetadata": {
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    "assignerShortName": "VulDB",
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    "datePublished": "2026-08-12T02:45:10.502Z",
    "dateReserved": "2026-08-09T17:50:46.986Z",
    "dateUpdated": "2026-08-12T12:35:38.910Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-CFH6-R6WV-JF9H

CVE-2025-15687 (GCVE-0-2025-15687)

Tags

Sightings

Nomenclature

Related by attack behaviour