CVE-2026-71676

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH 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 — 5 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(high)
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 19, 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 14× in last 7d / 14× 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 22:56 UTCEPSS rescore
  2. 2026-08-20 22:25 UTCGHSA enrichment
  3. 2026-08-20 11:25 UTCGHSA enrichment
  4. 2026-08-20 00:25 UTCEG score recompute
  5. 2026-08-20 00:25 UTCGHSA enrichment
  6. 2026-08-19 17:04 UTCEPSS rescore
  7. 2026-08-19 13:24 UTCEG score recompute
  8. 2026-08-19 13:24 UTCGHSA enrichment
  9. 2026-08-19 13:00 UTCEG score recompute▲ 7.50
  10. 2026-08-19 13:00 UTCGHSA enrichment
  11. 2026-08-19 12:57 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  12. 2026-08-18 20:22 UTCNVD update
  13. 2026-08-18 19:53 UTCEG score recompute
  14. 2026-08-18 19:53 UTCMITRE cvelistV5first tracked

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 19, 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 67.4% 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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