CVE-2026-47116

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-22. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

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

LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where the root and guest account passwords are stored in /etc/shadow as weak hashes recoverable with dictionary-based cracking tools. The recovered credentials authenticate against the device's Telnet and SSH services and grant root-level access to the operating system. These services are not confirmed to start automatically at boot, so exploitation requires Telnet or SSH to be running, whether enabled by the device configuration or started manually.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
75(Attend)
EG Risk 75/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

September 22, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Sep 23, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

LTSecurity LTK3500SF Hard-coded Credentials via Telnet/SSH | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ltsecurity-ltk3500sf-hard-coded-credentials-via-telnet-ssh
generic🟡 PoC Available

GitHub - AndreaLandriscina/Hardcoded-Credentials-in-LTSecurity-LTK3500SF: LTSecurity LTK3500SF (firmware AC3F_V1.1.0_build191121) was discovered to contain a hardcoded password for the root account, stored in /etc/shadow. · GitHub

https://github.com/AndreaLandriscina/Hardcoded-Credentials-in-LTSecurity-LTK3500SF

Vendor Advisories for CVE-2026-47116(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 21× in last 7d / 21× 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. 2026-09-24 01:01 UTCGHSA enrichment
  2. 2026-09-23 20:40 UTCEG score recompute
  3. 2026-09-23 20:40 UTCGHSA enrichment
  4. 2026-09-23 17:53 UTCEPSS rescore
  5. 2026-09-23 16:19 UTCEG score recompute
  6. 2026-09-23 16:19 UTCGHSA enrichment
  7. 2026-09-23 15:49 UTCEG score recompute
  8. 2026-09-23 15:49 UTCGHSA enrichment
  9. 2026-09-23 15:49 UTCMITRE cvelistV5CVSS v4 → 9.2
  10. 2026-09-23 15:20 UTCEG score recompute
  11. 2026-09-23 15:20 UTCGHSA enrichment
  12. 2026-09-23 14:50 UTCEG score recompute
  13. 2026-09-23 14:50 UTCGHSA enrichment
  14. 2026-09-23 13:58 UTCGHSA enrichment
  15. 2026-09-23 09:37 UTCGHSA enrichment
  16. 2026-09-23 05:16 UTCGHSA enrichment
  17. 2026-09-23 00:54 UTCEG score recompute
  18. 2026-09-23 00:54 UTCGHSA enrichment
  19. 2026-09-22 20:32 UTCEG score recompute
  20. 2026-09-22 19:23 UTCEG score recompute
  21. 2026-09-22 19:23 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-47116?
CVE-2026-47116 is a critical vulnerability published on September 22, 2026. LTSecurity LTK3500SF contains a hard-coded credentials vulnerability where the root and guest account passwords are stored in /etc/shadow as weak hashes recoverable with dictionary-based cracking tools. The recovered credentials authenticate against the device's Telnet and SSH services and grant…
When was CVE-2026-47116 disclosed?
CVE-2026-47116 was first published in the National Vulnerability Database on September 22, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47116 actively exploited?
CVE-2026-47116 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 57.3% of all scored CVEs.
What is the CVSS score of CVE-2026-47116?
CVE-2026-47116 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-47116?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47116, 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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