CVE-2026-75438

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. 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: 1%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 v2.7.7 allows a remote attacker to cause a denial of service via the ogs_sbi_time_parse() function

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
1%
EPSS %ILE
55%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Sep 8, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic

5GCVulDB/CVE-2026-75438 at main · hackeryounow/5GCVulDB · GitHub

https://github.com/hackeryounow/5GCVulDB/tree/main/CVE-2026-75438
generic

CVE-2026-75438 · GitHub

https://gist.github.com/hackeryounow/c299d593b89fd6487cab4182c8aecabf
github_commit Patch Available

commit 7227b2f5b254 (open5gs/open5gs)

Patch available: open5gs/open5gs v2.8.0 (contains commit 7227b2f5b254)

https://github.com/open5gs/open5gs/commit/7227b2f5b254160286798e058c189224360d99fc
generic🟡 PoC Available

[Bug]: SMF crash triggered by oversized ueLocationTimestamp in /nsmf-pdusession/v1/sm-contexts · Issue #4612 · open5gs/open5gs · GitHub

https://github.com/open5gs/open5gs/issues/4612

Vendor Advisories for CVE-2026-75438(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 28× in last 7d / 76× 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. 2026-09-25 01:51 UTCGHSA enrichment
  2. 2026-09-24 14:41 UTCEG score recompute
  3. 2026-09-24 14:41 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 03:31 UTCEG score recompute
  6. 2026-09-24 03:31 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 16:20 UTCGHSA enrichment
  9. 2026-09-23 05:10 UTCGHSA enrichment
  10. 2026-09-22 17:59 UTCEG score recompute
  11. 2026-09-22 17:59 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 05:59 UTCEG score recompute
  14. 2026-09-22 05:59 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 18:49 UTCGHSA enrichment
  17. 2026-09-21 07:39 UTCGHSA enrichment
  18. 2026-09-20 20:29 UTCEG score recompute
  19. 2026-09-20 20:29 UTCGHSA enrichment
  20. 2026-09-20 20:16 UTCEPSS rescore
  21. 2026-09-20 09:19 UTCGHSA enrichment
  22. 2026-09-19 22:09 UTCEG score recompute
  23. 2026-09-19 22:09 UTCGHSA enrichment
  24. 2026-09-19 10:58 UTCGHSA enrichment
  25. 2026-09-18 23:48 UTCEG score recompute
Show 51 more
  1. 2026-09-18 23:48 UTCGHSA enrichment
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 12:38 UTCGHSA enrichment
  4. 2026-09-18 01:27 UTCEG score recompute
  5. 2026-09-18 01:27 UTCGHSA enrichment
  6. 2026-09-17 14:17 UTCGHSA enrichment
  7. 2026-09-17 03:02 UTCGHSA enrichment
  8. 2026-09-16 15:51 UTCEG score recompute
  9. 2026-09-16 15:51 UTCGHSA enrichment
  10. 2026-09-16 14:08 UTCEPSS rescore
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-16 04:40 UTCGHSA enrichment
  13. 2026-09-15 17:30 UTCGHSA enrichment
  14. 2026-09-15 06:18 UTCEG score recompute
  15. 2026-09-15 06:18 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 19:07 UTCGHSA enrichment
  18. 2026-09-14 07:57 UTCGHSA enrichment
  19. 2026-09-13 20:47 UTCEG score recompute
  20. 2026-09-13 20:47 UTCGHSA enrichment
  21. 2026-09-13 09:36 UTCGHSA enrichment
  22. 2026-09-12 22:26 UTCEG score recompute
  23. 2026-09-12 22:25 UTCGHSA enrichment
  24. 2026-09-12 15:02 UTCEPSS rescore
  25. 2026-09-12 11:13 UTCGHSA enrichment
  26. 2026-09-12 00:02 UTCEG score recompute
  27. 2026-09-12 00:02 UTCGHSA enrichment
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 12:52 UTCEG score recompute
  30. 2026-09-11 12:51 UTCGHSA enrichment
  31. 2026-09-11 01:39 UTCGHSA enrichment
  32. 2026-09-10 14:29 UTCEG score recompute
  33. 2026-09-10 14:29 UTCGHSA enrichment
  34. 2026-09-10 09:35 UTCEPSS rescore
  35. 2026-09-10 03:19 UTCGHSA enrichment
  36. 2026-09-09 16:09 UTCGHSA enrichment
  37. 2026-09-09 14:33 UTCGHSA enrichment
  38. 2026-09-09 03:22 UTCEG score recompute
  39. 2026-09-09 03:22 UTCGHSA enrichment
  40. 2026-09-08 22:01 UTCEPSS rescore
  41. 2026-09-08 16:12 UTCEG score recompute
  42. 2026-09-08 16:11 UTCGHSA enrichment
  43. 2026-09-08 14:21 UTCEG score recompute▲ 7.50
  44. 2026-09-08 14:21 UTCGHSA enrichment
  45. 2026-09-08 14:19 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  46. 2026-09-07 18:47 UTCEG score recompute
  47. 2026-09-07 18:47 UTCGHSA enrichment
  48. 2026-09-06 13:48 UTCEPSS rescore
  49. 2026-09-04 21:23 UTCNVD update
  50. 2026-09-04 20:40 UTCEG score recompute
  51. 2026-09-04 20:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-75438?
CVE-2026-75438 is a high vulnerability published on September 4, 2026. Buffer Overflow vulnerability in Open5GS v2.7.7 allows a remote attacker to cause a denial of service via the ogssbitime_parse() function
When was CVE-2026-75438 disclosed?
CVE-2026-75438 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75438 actively exploited?
CVE-2026-75438 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 44.6% of all scored CVEs.
What is the CVSS score of CVE-2026-75438?
CVE-2026-75438 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-75438?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75438, 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

Explore the affected products and dependency analysis for CVE-2026-75438

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