CVE-2026-101038

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH confidence

Score 9.9 from GitHub Security Advisory (severity: HIGH) published 2026-09-28. A secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
9.9EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.9Exploit: Elevated riskExposed services: Not assessed

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

A vulnerability was determined in FAST FAC1200R 5.0_20201119_1.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Parser. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
9.9
EG Score
9.9CRITICALhigh confidence
EG Risk
61
EG Risk 61/100CISA SSVC

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
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 28, 2026

Last Modified

September 28, 2026

Advisory Details (1)

Auto-updated Sep 28, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

vuls-find-VxWorks/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow(1)/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow at main · xiaobor123/vuls-find-VxWorks · GitHub

https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow(1)/vul-find-FAST_FAC1200R-twlantask-MmtAtePrase-stack-overflow

Vendor Advisories for CVE-2026-101038(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 51× in last 7d / 51× 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. 2026-10-04 10:33 UTCGHSA enrichment
  2. 2026-10-04 06:26 UTCGHSA enrichment
  3. 2026-10-04 02:21 UTCGHSA enrichment
  4. 2026-10-03 22:16 UTCGHSA enrichment
  5. 2026-10-03 18:09 UTCEG score recompute
  6. 2026-10-03 18:08 UTCGHSA enrichment
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-03 14:03 UTCGHSA enrichment
  9. 2026-10-03 09:58 UTCGHSA enrichment
  10. 2026-10-03 05:51 UTCGHSA enrichment
  11. 2026-10-03 01:46 UTCGHSA enrichment
  12. 2026-10-02 21:41 UTCGHSA enrichment
  13. 2026-10-02 17:37 UTCEG score recompute
  14. 2026-10-02 17:37 UTCGHSA enrichment
  15. 2026-10-02 13:32 UTCGHSA enrichment
  16. 2026-10-02 09:27 UTCGHSA enrichment
  17. 2026-10-02 05:22 UTCGHSA enrichment
  18. 2026-10-02 01:15 UTCGHSA enrichment
  19. 2026-10-01 21:10 UTCEG score recompute
  20. 2026-10-01 21:10 UTCGHSA enrichment
  21. 2026-10-01 19:49 UTCEPSS rescore
  22. 2026-10-01 17:05 UTCGHSA enrichment
  23. 2026-10-01 13:00 UTCGHSA enrichment
  24. 2026-10-01 08:56 UTCGHSA enrichment
  25. 2026-10-01 04:51 UTCGHSA enrichment
Show 26 more
  1. 2026-10-01 00:44 UTCGHSA enrichment
  2. 2026-09-30 20:39 UTCGHSA enrichment
  3. 2026-09-30 16:35 UTCEG score recompute
  4. 2026-09-30 16:35 UTCGHSA enrichment
  5. 2026-09-30 15:02 UTCEPSS rescore
  6. 2026-09-30 12:29 UTCGHSA enrichment
  7. 2026-09-30 08:21 UTCGHSA enrichment
  8. 2026-09-30 04:16 UTCGHSA enrichment
  9. 2026-09-30 00:11 UTCGHSA enrichment
  10. 2026-09-29 20:04 UTCGHSA enrichment
  11. 2026-09-29 15:59 UTCEG score recompute
  12. 2026-09-29 15:59 UTCGHSA enrichment
  13. 2026-09-29 15:20 UTCEPSS rescore
  14. 2026-09-29 11:54 UTCGHSA enrichment
  15. 2026-09-29 07:50 UTCGHSA enrichment
  16. 2026-09-29 03:46 UTCGHSA enrichment
  17. 2026-09-28 23:41 UTCEG score recompute
  18. 2026-09-28 23:41 UTCGHSA enrichment
  19. 2026-09-28 19:35 UTCGHSA enrichment
  20. 2026-09-28 15:28 UTCEG score recompute
  21. 2026-09-28 15:28 UTCGHSA enrichment
  22. 2026-09-28 11:29 UTCEG score recompute
  23. 2026-09-28 11:29 UTCNVD updateCVSS v4 → 8.6
  24. 2026-09-28 10:57 UTCEG score recompute
  25. 2026-09-28 10:42 UTCEG score recompute
  26. 2026-09-28 10:42 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-101038?
CVE-2026-101038 is a critical vulnerability published on September 28, 2026. A vulnerability was determined in FAST FAC1200R 5.0202011191.0.2. Affected by this vulnerability is the function MmtAtePrase of the component MmtAtePrase Parser. This manipulation causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been publicly…
When was CVE-2026-101038 disclosed?
CVE-2026-101038 was first published on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-101038 actively exploited?
CVE-2026-101038 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101038?
CVE-2026-101038 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-101038?
No fix for CVE-2026-101038 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-101038 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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