CVE-2023-43478

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 17.4%, top 3% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 17%CVSS: 9.8Exploit: NoneExposed: 0

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

fake_upload.cgi on the Telstra Smart Modem Gen 2 (Arcadyan LH1000), firmware versions < 0.18.15r, allows unauthenticated attackers to upload firmware images and configuration backups, which could allow them to alter the firmware or the configuration on the device, ultimately leading to code execution as root. 

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track*)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
96.8%
KEV
Not listed

Published

September 20, 2023

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Jun 24, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Multiple Vulnerabilities in Telstra Device - Research Advisory | Tenable®

https://www.tenable.com/security/research/tra-2023-19

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× 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. 2026-07-24 14:16 UTCEPSS rescore
  2. 2026-07-23 14:16 UTCEPSS rescore
  3. 2026-07-23 14:16 UTCEPSS rescore
  4. 2026-07-23 02:26 UTCEG score recompute
  5. 2026-07-22 23:13 UTCEG score recompute▲ 1.00
  6. 2026-07-22 14:06 UTCEPSS rescore
  7. 2026-07-21 15:23 UTCEPSS rescore
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  9. 2026-07-20 17:06 UTCEPSS rescore
  10. 2026-07-19 02:27 UTCEPSS rescore
  11. 2026-07-18 10:03 UTCEPSS rescore
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  13. 2026-07-16 17:01 UTCEPSS rescore
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  15. 2026-07-15 16:56 UTCEPSS rescore
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  17. 2026-07-15 01:58 UTCEPSS rescore
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  24. 2026-07-11 08:26 UTCEPSS rescore
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  1. 2026-07-09 19:08 UTCEPSS rescore
  2. 2026-07-08 15:13 UTCEPSS rescore
  3. 2026-07-07 13:44 UTCEPSS rescore
  4. 2026-07-06 16:26 UTCEPSS rescore
  5. 2026-07-06 16:26 UTCEPSS rescore
  6. 2026-07-05 02:29 UTCEPSS rescore
  7. 2026-07-01 15:05 UTCEPSS rescore
  8. 2026-06-30 23:21 UTCEPSS rescore
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  10. 2026-06-29 14:05 UTCEPSS rescore
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  15. 2026-06-27 03:07 UTCEPSS rescore
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  17. 2026-06-25 13:48 UTCEPSS rescore
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  19. 2026-06-24 14:04 UTCEPSS rescore
  20. 2026-06-24 14:04 UTCEPSS rescore
  21. 2026-06-24 06:22 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  22. 2026-06-23 21:31 UTCEPSS rescore
  23. 2026-06-23 21:31 UTCEPSS rescore
  24. 2026-06-21 14:55 UTCEPSS rescore
  25. 2026-06-21 14:55 UTCEPSS rescore
  26. 2026-06-21 01:58 UTCEPSS rescore
  27. 2026-06-21 01:58 UTCEPSS rescore
  28. 2026-06-19 19:24 UTCEPSS rescore
  29. 2026-06-19 19:24 UTCEPSS rescore
  30. 2026-06-18 17:51 UTCEPSS rescore
  31. 2026-06-17 17:51 UTCEPSS rescore
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  34. 2026-06-16 17:51 UTCEPSS rescore
  35. 2026-06-15 17:47 UTCEPSS rescore
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  37. 2026-06-13 22:59 UTCEPSS rescore
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  39. 2026-06-12 23:10 UTCEPSS rescore
  40. 2026-06-12 23:10 UTCEPSS rescore
  41. 2026-06-11 13:59 UTCEPSS rescore
  42. 2026-06-11 13:59 UTCEPSS rescore
  43. 2026-06-10 22:17 UTCEPSS rescore
  44. 2026-06-10 13:21 UTCEPSS rescore
  45. 2026-06-10 13:21 UTCEPSS rescore
  46. 2026-06-07 15:23 UTCEPSS rescore
  47. 2026-06-07 15:23 UTCEPSS rescore
  48. 2026-06-05 22:46 UTCEPSS rescore
  49. 2026-06-05 22:46 UTCEPSS rescore
  50. 2026-06-05 06:09 UTCEPSS rescore
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  53. 2026-06-04 13:11 UTCEPSS rescore
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  55. 2026-06-02 20:12 UTCEPSS rescore
  56. 2026-06-02 20:12 UTCEPSS rescore
  57. 2026-06-01 13:51 UTCEPSS rescore
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  59. 2026-05-31 22:30 UTCEPSS rescore
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  61. 2026-05-31 00:15 UTCEPSS rescore
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  63. 2026-05-29 13:43 UTCEPSS rescore
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  65. 2026-05-28 13:44 UTCEPSS rescore
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  67. 2026-05-27 13:39 UTCEPSS rescore
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  69. 2026-05-26 07:18 UTCEPSS rescore
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  71. 2026-05-26 07:18 UTCEPSS rescore
  72. 2026-05-24 17:21 UTCEG score recompute
  73. 2026-05-24 17:21 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2023-43478?
CVE-2023-43478 is a critical vulnerability published on September 20, 2023. fake_upload.cgi on the Telstra Smart Modem Gen 2 (Arcadyan LH1000), firmware versions < 0.18.15r, allows unauthenticated attackers to upload firmware images and configuration backups, which could allow them to alter the firmware or the configuration on the device, ultimately leading to code…
When was CVE-2023-43478 disclosed?
CVE-2023-43478 was first published in the National Vulnerability Database on September 20, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-43478 actively exploited?
CVE-2023-43478 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-43478?
CVE-2023-43478 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-43478?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-43478, 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.

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