CVE-2026-71676

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Buffer Overflow vulnerability in Open5GS v.2.7.0 allows a remote attacker to cause a denial of service via the NAS 5GS decoder chain, triggered when the message type byte of a NAS PDU is mutated

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: 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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 31, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Open5GS_2.md · GitHub

https://gist.github.com/centauruszzz/0d267967fc5d072f31c866603f7aaf7c

Vendor Advisories for CVE-2026-71676(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 26× in last 7d / 109× 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.

Showing the most recent 100 of 129 total refreshes for this CVE.

  1. 2026-09-21 08:14 UTCGHSA enrichment
  2. 2026-09-20 20:54 UTCEG score recompute
  3. 2026-09-20 20:54 UTCGHSA enrichment
  4. 2026-09-20 20:16 UTCEPSS rescore
  5. 2026-09-20 09:53 UTCGHSA enrichment
  6. 2026-09-19 22:52 UTCEG score recompute
  7. 2026-09-19 22:52 UTCGHSA enrichment
  8. 2026-09-19 10:57 UTCGHSA enrichment
  9. 2026-09-18 21:54 UTCEG score recompute
  10. 2026-09-18 21:54 UTCGHSA enrichment
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 08:54 UTCGHSA enrichment
  13. 2026-09-17 21:53 UTCEG score recompute
  14. 2026-09-17 21:53 UTCGHSA enrichment
  15. 2026-09-17 10:01 UTCGHSA enrichment
  16. 2026-09-16 23:01 UTCEG score recompute
  17. 2026-09-16 23:00 UTCGHSA enrichment
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 06:12 UTCEG score recompute
  20. 2026-09-16 06:11 UTCGHSA enrichment
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-15 19:11 UTCGHSA enrichment
  23. 2026-09-15 06:50 UTCEG score recompute
  24. 2026-09-15 06:50 UTCGHSA enrichment
  25. 2026-09-15 03:12 UTCEPSS rescore
Show 75 more
  1. 2026-09-14 19:49 UTCGHSA enrichment
  2. 2026-09-14 07:34 UTCGHSA enrichment
  3. 2026-09-13 20:34 UTCEG score recompute
  4. 2026-09-13 20:34 UTCGHSA enrichment
  5. 2026-09-13 09:33 UTCGHSA enrichment
  6. 2026-09-12 22:33 UTCEG score recompute
  7. 2026-09-12 22:33 UTCGHSA enrichment
  8. 2026-09-12 15:02 UTCEPSS rescore
  9. 2026-09-12 11:32 UTCGHSA enrichment
  10. 2026-09-12 00:19 UTCEG score recompute
  11. 2026-09-12 00:19 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 13:18 UTCEG score recompute
  14. 2026-09-11 13:18 UTCGHSA enrichment
  15. 2026-09-11 00:42 UTCGHSA enrichment
  16. 2026-09-10 13:18 UTCEG score recompute
  17. 2026-09-10 13:18 UTCGHSA enrichment
  18. 2026-09-10 09:35 UTCEPSS rescore
  19. 2026-09-10 02:17 UTCGHSA enrichment
  20. 2026-09-09 15:16 UTCGHSA enrichment
  21. 2026-09-09 03:34 UTCEG score recompute
  22. 2026-09-09 03:34 UTCGHSA enrichment
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-07 21:31 UTCEG score recompute
  25. 2026-09-07 21:31 UTCGHSA enrichment
  26. 2026-09-07 10:31 UTCGHSA enrichment
  27. 2026-09-06 21:40 UTCEG score recompute
  28. 2026-09-06 21:40 UTCGHSA enrichment
  29. 2026-09-06 13:48 UTCEPSS rescore
  30. 2026-09-06 10:36 UTCGHSA enrichment
  31. 2026-09-05 23:36 UTCEG score recompute
  32. 2026-09-05 23:36 UTCGHSA enrichment
  33. 2026-09-05 12:36 UTCGHSA enrichment
  34. 2026-09-05 01:09 UTCGHSA enrichment
  35. 2026-09-04 14:08 UTCEG score recompute
  36. 2026-09-04 14:08 UTCGHSA enrichment
  37. 2026-09-04 05:07 UTCEPSS rescore
  38. 2026-09-04 03:01 UTCGHSA enrichment
  39. 2026-09-03 15:34 UTCGHSA enrichment
  40. 2026-09-03 04:30 UTCGHSA enrichment
  41. 2026-09-02 17:08 UTCEG score recompute
  42. 2026-09-02 17:08 UTCGHSA enrichment
  43. 2026-09-02 14:12 UTCEPSS rescore
  44. 2026-09-02 05:24 UTCGHSA enrichment
  45. 2026-09-01 18:16 UTCEG score recompute
  46. 2026-09-01 18:16 UTCGHSA enrichment
  47. 2026-09-01 13:54 UTCEPSS rescore
  48. 2026-09-01 07:14 UTCEG score recompute
  49. 2026-09-01 07:14 UTCGHSA enrichment
  50. 2026-09-01 04:40 UTCEPSS rescore
  51. 2026-08-31 20:13 UTCGHSA enrichment
  52. 2026-08-31 11:59 UTCGHSA enrichment
  53. 2026-08-31 00:59 UTCEG score recompute
  54. 2026-08-31 00:59 UTCGHSA enrichment
  55. 2026-08-30 19:17 UTCEPSS rescore
  56. 2026-08-30 13:59 UTCGHSA enrichment
  57. 2026-08-30 02:59 UTCEG score recompute
  58. 2026-08-30 02:59 UTCGHSA enrichment
  59. 2026-08-30 01:22 UTCEPSS rescore
  60. 2026-08-29 15:58 UTCGHSA enrichment
  61. 2026-08-29 04:56 UTCEG score recompute
  62. 2026-08-29 04:56 UTCGHSA enrichment
  63. 2026-08-28 21:42 UTCEPSS rescore
  64. 2026-08-28 06:49 UTCGHSA enrichment
  65. 2026-08-27 19:30 UTCEG score recompute
  66. 2026-08-27 19:30 UTCGHSA enrichment
  67. 2026-08-27 08:30 UTCGHSA enrichment
  68. 2026-08-26 21:29 UTCEG score recompute
  69. 2026-08-26 21:29 UTCGHSA enrichment
  70. 2026-08-26 14:47 UTCEPSS rescore
  71. 2026-08-26 10:29 UTCGHSA enrichment
  72. 2026-08-25 23:29 UTCEG score recompute
  73. 2026-08-25 23:29 UTCGHSA enrichment
  74. 2026-08-25 13:49 UTCEPSS rescore
  75. 2026-08-25 12:29 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-71676?
CVE-2026-71676 is a high vulnerability published on August 18, 2026. Buffer Overflow vulnerability in Open5GS v.2.7.0 allows a remote attacker to cause a denial of service via the NAS 5GS decoder chain, triggered when the message type byte of a NAS PDU is mutated
When was CVE-2026-71676 disclosed?
CVE-2026-71676 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71676 actively exploited?
CVE-2026-71676 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.8% of all scored CVEs.
What is the CVSS score of CVE-2026-71676?
CVE-2026-71676 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-71676?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71676, 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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