CVE-2025-15687

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-12. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 12, 2026

Advisory Details (5)

Auto-updated Aug 12, 2026
Patch available. Sources: github_pr, github_release.
generic

GitHub - open5gs/open5gs: Open5GS is a C-language Open Source implementation for 5G Core and EPC, i.e. the core network of LTE/NR network (Release-19) · GitHub

https://github.com/open5gs/open5gs/
github_release Patch Available

v2.7.7

Patch available: open5gs/open5gs v2.7.7

https://github.com/open5gs/open5gs/releases/tag/v2.7.7
generic
https://github.com/user-attachments/files/21515527/SMF.crashes.zip
github_pr Patch Available

[DIAM] Enhance Exception Handling in all Rx Callbacks

Patch available: open5gs/open5gs v2.7.7 (PR #4034 merged 2025-08-02)

https://github.com/open5gs/open5gs/pull/4034
generic

[Bug]: SMF crashes when receiving a delayed Gx CCA response for a previously deleted session · Issue #4027 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4027

Vendor Advisories for CVE-2025-15687(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 21× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 07:17 UTCEG score recompute
  2. 2026-08-21 07:17 UTCGHSA enrichment
  3. 2026-08-20 22:54 UTCEPSS rescore
  4. 2026-08-20 06:01 UTCEG score recompute
  5. 2026-08-20 06:01 UTCGHSA enrichment
  6. 2026-08-19 17:02 UTCEPSS rescore
  7. 2026-08-19 04:44 UTCEG score recompute
  8. 2026-08-19 04:44 UTCGHSA enrichment
  9. 2026-08-18 13:47 UTCEPSS rescore
  10. 2026-08-18 03:28 UTCEG score recompute
  11. 2026-08-18 03:27 UTCGHSA enrichment
  12. 2026-08-17 13:46 UTCEPSS rescore
  13. 2026-08-17 02:06 UTCEG score recompute
  14. 2026-08-17 02:06 UTCGHSA enrichment
  15. 2026-08-16 14:55 UTCEPSS rescore
  16. 2026-08-16 02:13 UTCEPSS rescore
  17. 2026-08-16 02:13 UTCEPSS rescore
  18. 2026-08-16 00:50 UTCEG score recompute
  19. 2026-08-16 00:50 UTCGHSA enrichment
  20. 2026-08-15 01:29 UTCEPSS rescore
  21. 2026-08-14 23:33 UTCGHSA enrichment
  22. 2026-08-13 22:17 UTCEG score recompute
  23. 2026-08-13 22:17 UTCGHSA enrichment
  24. 2026-08-13 21:59 UTCEPSS rescore
  25. 2026-08-12 21:01 UTCEG score recompute
Show 12 more
  1. 2026-08-12 21:01 UTCGHSA enrichment
  2. 2026-08-12 13:49 UTCEPSS rescore
  3. 2026-08-12 13:37 UTCEG score recompute
  4. 2026-08-12 13:37 UTCGHSA enrichment
  5. 2026-08-12 13:36 UTCNVD updateCVSS v4 → 2.1
  6. 2026-08-12 12:55 UTCEG score recompute
  7. 2026-08-12 12:55 UTCGHSA enrichment
  8. 2026-08-12 12:54 UTCMITRE cvelistV5CVSS v4 → 5.3
  9. 2026-08-12 04:48 UTCEG score recompute
  10. 2026-08-12 04:47 UTCNVD updateCVSS v4 → 2.1
  11. 2026-08-12 03:30 UTCEG score recompute
  12. 2026-08-12 03:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-15687?
CVE-2025-15687 is a medium vulnerability published on August 12, 2026. A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smfgxcca_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…
When was CVE-2025-15687 disclosed?
CVE-2025-15687 was first published in the National Vulnerability Database on August 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-15687 actively exploited?
CVE-2025-15687 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.3% of all scored CVEs.
What is the CVSS score of CVE-2025-15687?
CVE-2025-15687 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2025-15687?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-15687, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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