CVE-2025-0309

MEDIUMNVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
6.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.0Exploit: NoneExposed: 0

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

An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to elevate privileges.

CVSS v3
6.0
EG Score
6.0(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity60% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
7.0%
KEV
Not listed

Published

August 14, 2025

Last Modified

April 15, 2026

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× 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.

Showing the most recent 100 of 120 total refreshes for this CVE.

  1. 2026-07-23 14:17 UTCEPSS rescore
  2. 2026-07-23 02:47 UTCEG score recompute
  3. 2026-07-22 14:07 UTCEPSS rescore
  4. 2026-07-22 14:07 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
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  12. 2026-07-16 17:02 UTCEPSS rescore
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  1. 2026-07-08 15:14 UTCEPSS rescore
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  11. 2026-06-30 23:21 UTCEPSS rescore
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  22. 2026-06-22 14:25 UTCEPSS rescore
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  24. 2026-06-21 14:56 UTCEPSS rescore
  25. 2026-06-21 14:56 UTCEPSS rescore
  26. 2026-06-21 01:59 UTCEPSS rescore
  27. 2026-06-19 19:25 UTCEPSS rescore
  28. 2026-06-19 19:25 UTCEPSS rescore
  29. 2026-06-18 17:52 UTCEPSS rescore
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  35. 2026-06-14 23:17 UTCEPSS rescore
  36. 2026-06-13 22:59 UTCEPSS rescore
  37. 2026-06-12 23:11 UTCEPSS rescore
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  39. 2026-06-11 13:59 UTCEPSS rescore
  40. 2026-06-10 22:18 UTCEPSS rescore
  41. 2026-06-10 22:18 UTCEPSS rescore
  42. 2026-06-10 13:21 UTCEPSS rescore
  43. 2026-06-10 13:21 UTCEPSS rescore
  44. 2026-06-08 15:45 UTCEG score recompute▲ 6.00
  45. 2026-06-08 15:45 UTCGHSA enrichment
  46. 2026-06-08 14:16 UTCEPSS rescore
  47. 2026-06-08 14:16 UTCEPSS rescore
  48. 2026-06-07 15:24 UTCEPSS rescore
  49. 2026-06-06 13:47 UTCEPSS rescore
  50. 2026-06-06 13:46 UTCEPSS rescore
  51. 2026-06-05 22:46 UTCEPSS rescore
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  53. 2026-06-05 06:10 UTCEPSS rescore
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  55. 2026-06-04 13:11 UTCEPSS rescore
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  57. 2026-06-02 20:12 UTCEPSS rescore
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  59. 2026-06-01 13:51 UTCEPSS rescore
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  61. 2026-05-31 22:30 UTCEPSS rescore
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  63. 2026-05-31 00:16 UTCEPSS rescore
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  65. 2026-05-29 13:43 UTCEPSS rescore
  66. 2026-05-28 13:44 UTCEPSS rescore
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  69. 2026-05-27 13:40 UTCEPSS rescore
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  72. 2026-05-26 13:43 UTCEPSS rescore
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  74. 2026-05-26 13:43 UTCEPSS rescore
  75. 2026-05-26 07:18 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCAmberWolfCyber/UpSkope
    First seen Aug 29, 2025

    Custom IPC Client and Proof of Concept exploit for CVE-2025-0309 (Netskope Windows Client LPE)

    Open source ↗

Frequently asked(5)

What is CVE-2025-0309?
CVE-2025-0309 is a medium vulnerability published on August 14, 2025. An insufficient validation on the server connection endpoint in Netskope Client allows local users to elevate privileges on the system. The insufficient validation allows Netskope Client to connect to any other server with Public Signed CA TLS certificates and send specially crafted responses to…
When was CVE-2025-0309 disclosed?
CVE-2025-0309 was first published in the National Vulnerability Database on August 14, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-0309 actively exploited?
CVE-2025-0309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-0309?
CVE-2025-0309 has a CVSS v3 base score of 6.0 (NVD).
How do I remediate CVE-2025-0309?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-0309, 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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