CVE-2025-15684

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM 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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 5.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
5.3MEDIUMmedium confidence
EG Risk
55
EG Risk 55/100

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 (value × EchelonGraph’s weight)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
53rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 12, 2026

Last Modified

September 29, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available. Sources: github_commit, github_release.
Web page

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
Web page

[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 14× in last 7d / 68× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 163 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 65 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:53 UTCEG score recompute
  2. 2026-10-11 19:03 UTCEG score recompute
  3. 2026-10-11 15:43 UTCEG score recompute
  4. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  5. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  7. 2026-10-08 17:08 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  8. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  9. 2026-10-06 17:33 UTCEG score recompute
  10. 2026-10-06 17:33 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  11. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  12. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  14. 2026-10-04 22:33 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  15. 2026-10-03 20:25 UTCEG score recompute
  16. 2026-10-03 20:25 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  17. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  18. 2026-10-02 08:24 UTCEG score recompute
  19. 2026-10-02 08:24 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  20. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-09-30 21:59 UTCEG score recompute
  22. 2026-09-30 21:59 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  23. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-09-29 11:12 UTCEG score recompute
  25. 2026-09-29 11:12 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
Show 73 more
  1. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-09-28 09:29 UTCEG score recompute
  3. 2026-09-28 09:29 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  4. 2026-09-27 09:58 UTCEG score recompute
  5. 2026-09-27 09:58 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  6. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  7. 2026-09-25 03:44 UTCEG score recompute
  8. 2026-09-25 03:44 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  9. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-09-23 23:33 UTCEG score recompute
  11. 2026-09-23 23:33 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  12. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-09-22 23:50 UTCEG score recompute
  14. 2026-09-22 23:50 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  15. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-09-21 23:49 UTCEG score recompute
  17. 2026-09-21 23:49 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  18. 2026-09-21 00:17 UTCEG score recompute
  19. 2026-09-21 00:17 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  20. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-20 00:12 UTCEG score recompute
  22. 2026-09-20 00:12 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  23. 2026-09-19 00:41 UTCEG score recompute
  24. 2026-09-19 00:41 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-09-18 01:10 UTCEG score recompute
  27. 2026-09-18 01:10 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  28. 2026-09-17 01:39 UTCEG score recompute
  29. 2026-09-17 01:39 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  30. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  31. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  32. 2026-09-16 02:08 UTCEG score recompute
  33. 2026-09-16 02:08 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  34. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  35. 2026-09-15 02:37 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  36. 2026-09-14 03:04 UTCEG score recompute
  37. 2026-09-14 03:04 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  38. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-09-13 03:33 UTCEG score recompute
  40. 2026-09-13 03:33 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  41. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  42. 2026-09-12 04:02 UTCEG score recompute
  43. 2026-09-12 04:02 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  44. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  45. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  46. 2026-09-11 04:29 UTCEG score recompute
  47. 2026-09-11 04:29 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  48. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  49. 2026-09-10 04:51 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  50. 2026-09-09 05:20 UTCEG score recompute
  51. 2026-09-09 05:20 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  52. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  53. 2026-09-08 00:56 UTCEG score recompute
  54. 2026-09-08 00:55 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  55. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  56. 2026-09-07 01:25 UTCEG score recompute
  57. 2026-09-07 01:25 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  58. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  59. 2026-09-06 00:44 UTCEG score recompute
  60. 2026-09-06 00:44 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  61. 2026-09-05 01:13 UTCEG score recompute
  62. 2026-09-05 01:12 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  63. 2026-09-04 13:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  64. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  65. 2026-09-04 01:40 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  66. 2026-09-02 23:42 UTCEG score recompute
  67. 2026-09-02 23:42 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  68. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  69. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  70. 2026-09-01 11:46 UTCEG score recompute
  71. 2026-09-01 11:46 UTCGHSA enrichmentGHSA-c5w8-855p-98pc · GitHub CVSS 5.3
  72. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  73. 2026-08-31 09:54 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-15684?
CVE-2025-15684 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2025-15684 published?
The CVE record for CVE-2025-15684 was published on August 12, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 29, 2026; the record at its source may have been updated since.
Is CVE-2025-15684 actively exploited?
CVE-2025-15684 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-15684?
CVE-2025-15684 has a CVSS base score of 5.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-15684?
A fix for CVE-2025-15684 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-15684 are linked in the Vendor Advisories panel on this page.

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