CVE-2026-71809

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-10. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

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

Authentication Bypass via Hardcoded Master Verification Code vulnerability in Siam Ordering (siam-server) 1.0.0 allows remote unauthenticated attackers to log in as any user, merchant, or administrator.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
52(Track*)
EG Risk 52/100SSVC: Track*

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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 14, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
No patch confirmed yet.
generic

Authentication Bypass via Hardcoded Universal Master SMS Verification Code ("123456") · Issue #11 · W000i/vuln · GitHub

https://github.com/W000i/vuln/issues/11

Vendor Advisories for CVE-2026-71809(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 / 33× 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. 2026-09-19 04:43 UTCEG score recompute
  2. 2026-09-19 04:43 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 17:54 UTCGHSA enrichment
  5. 2026-09-18 07:05 UTCGHSA enrichment
  6. 2026-09-17 20:16 UTCEG score recompute
  7. 2026-09-17 20:16 UTCGHSA enrichment
  8. 2026-09-17 08:24 UTCGHSA enrichment
  9. 2026-09-16 21:33 UTCEG score recompute
  10. 2026-09-16 21:33 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 10:43 UTCEG score recompute
  13. 2026-09-16 10:43 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 23:50 UTCGHSA enrichment
  16. 2026-09-15 13:01 UTCEG score recompute
  17. 2026-09-15 13:01 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 02:11 UTCEG score recompute
  20. 2026-09-15 02:11 UTCGHSA enrichment
  21. 2026-09-14 15:22 UTCEG score recompute
  22. 2026-09-14 15:22 UTCGHSA enrichment
  23. 2026-09-14 14:25 UTCEG score recompute▲ 8.10
  24. 2026-09-14 14:25 UTCGHSA enrichment
  25. 2026-09-14 14:24 UTCMITRE cvelistV5CVSS v3 → 8.1 · severity → HIGH
Show 8 more
  1. 2026-09-13 11:33 UTCEG score recompute
  2. 2026-09-13 11:33 UTCGHSA enrichment
  3. 2026-09-12 15:02 UTCEPSS rescore
  4. 2026-09-11 14:53 UTCEPSS rescore
  5. 2026-09-10 15:59 UTCGHSA enrichment
  6. 2026-09-09 23:31 UTCNVD update
  7. 2026-09-09 22:20 UTCEG score recompute
  8. 2026-09-09 22:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-71809?
CVE-2026-71809 is a high vulnerability published on September 9, 2026. Authentication Bypass via Hardcoded Master Verification Code vulnerability in Siam Ordering (siam-server) 1.0.0 allows remote unauthenticated attackers to log in as any user, merchant, or administrator.
When was CVE-2026-71809 disclosed?
CVE-2026-71809 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-71809 actively exploited?
CVE-2026-71809 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 70.7% of all scored CVEs.
What is the CVSS score of CVE-2026-71809?
CVE-2026-71809 has a CVSS v3.1 base score of 8.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-71809?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-71809, 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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