CVE-2025-15684

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-08-12. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A vulnerability was detected in Open5GS up to 2.7.6. Affected is the function diam_log_func of the file lib/diameter/common/init.c of the component CER Handler. The manipulation results in reachable assertion. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version 2.7.7 is able to address this issue. The patch is identified as c1a803516a3c0485696cb9bcca7a80ad857c7383. It is advisable to upgrade the affected component.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
55(Attend)
EG Risk 55/100SSVC: Attend

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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 13, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available. Sources: github_commit, 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
github_commit Patch Available

commit c1a803516a3c (open5gs/open5gs)

Patch available: open5gs/open5gs v2.7.7 (contains commit c1a803516a3c)

https://github.com/open5gs/open5gs/commit/c1a803516a3c0485696cb9bcca7a80ad857c7383
generic

[Bug]:HSS crash-Malformed CER (VS-Application-Id) triggers freeDiameter parserules_check_one_rule() abort · Issue #4155 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4155

Vendor Advisories for CVE-2025-15684(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 / 34× 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. 2026-08-20 14:19 UTCEG score recompute
  2. 2026-08-20 14:19 UTCGHSA enrichment
  3. 2026-08-19 17:02 UTCEPSS rescore
  4. 2026-08-19 14:47 UTCGHSA enrichment
  5. 2026-08-18 15:13 UTCEG score recompute
  6. 2026-08-18 15:13 UTCGHSA enrichment
  7. 2026-08-18 13:47 UTCEPSS rescore
  8. 2026-08-17 14:35 UTCEG score recompute
  9. 2026-08-17 14:35 UTCGHSA enrichment
  10. 2026-08-17 13:46 UTCEPSS rescore
  11. 2026-08-16 15:04 UTCEG score recompute
  12. 2026-08-16 15:04 UTCGHSA enrichment
  13. 2026-08-16 14:55 UTCEPSS rescore
  14. 2026-08-16 02:13 UTCEPSS rescore
  15. 2026-08-16 02:13 UTCEPSS rescore
  16. 2026-08-15 15:33 UTCEG score recompute
  17. 2026-08-15 15:33 UTCGHSA enrichment
  18. 2026-08-15 01:29 UTCEPSS rescore
  19. 2026-08-14 16:02 UTCEG score recompute
  20. 2026-08-14 16:02 UTCGHSA enrichment
  21. 2026-08-13 21:59 UTCEPSS rescore
  22. 2026-08-13 16:31 UTCEG score recompute
  23. 2026-08-13 16:31 UTCGHSA enrichment
  24. 2026-08-13 16:25 UTCNVD updateCVSS v4 → 5.5
  25. 2026-08-13 15:34 UTCEG score recompute
Show 9 more
  1. 2026-08-13 15:34 UTCGHSA enrichment
  2. 2026-08-13 15:31 UTCMITRE cvelistV5CVSS v4 → 6.9
  3. 2026-08-12 21:02 UTCEG score recompute
  4. 2026-08-12 21:02 UTCGHSA enrichment
  5. 2026-08-12 13:49 UTCEPSS rescore
  6. 2026-08-12 03:25 UTCEG score recompute
  7. 2026-08-12 03:24 UTCNVD updateCVSS v4 → 5.5
  8. 2026-08-12 02:39 UTCEG score recompute
  9. 2026-08-12 02:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2025-15684?
CVE-2025-15684 is a medium vulnerability published on August 12, 2026. A vulnerability was detected in Open5GS up to 2.7.6. Affected is the function diamlogfunc of the file lib/diameter/common/init.c of the component CER Handler. The manipulation results in reachable assertion. The attack can be executed remotely. The exploit is now public and may be used. Upgrading…
When was CVE-2025-15684 disclosed?
CVE-2025-15684 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-15684 actively exploited?
CVE-2025-15684 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 49.3% of all scored CVEs.
What is the CVSS score of CVE-2025-15684?
CVE-2025-15684 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2025-15684?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-15684, 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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