CVE-2009-0085

HIGHCVSS v2 · 7.17.1—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.1 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:N/I:C/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 15.2% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Elevated
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 15%CVSS v2: 7.1Exploit: Elevated riskExposed: 0

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

The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client's key exchange data in Transport Layer Security (TLS) handshake messages, which allows remote attackers to spoof authentication by crafting a TLS packet based on knowledge of the certificate but not the private key, aka "SChannel Spoofing Vulnerability."

CVSS v2.0 (legacy)
7.1HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.1(low)
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
Severity71% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
15%
EPSS %ILE
96%
KEV
Not listed

Published

March 10, 2009

Last Modified

April 23, 2026

References (14)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× 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. 2026-07-26 13:37 UTCEG score recompute▲ 7.10
  2. 2026-07-25 14:12 UTCEPSS rescore
  3. 2026-07-24 14:12 UTCEPSS rescore
  4. 2026-07-23 14:14 UTCEPSS rescore
  5. 2026-07-23 00:58 UTCEG score recompute
  6. 2026-07-23 00:36 UTCEG score recompute
  7. 2026-07-23 00:03 UTCEG score recompute
  8. 2026-07-22 21:42 UTCEG score recompute
  9. 2026-07-22 14:03 UTCEPSS rescore
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  1. 2026-07-04 06:27 UTCEPSS rescore
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  16. 2026-06-21 01:56 UTCEPSS rescore
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  18. 2026-06-19 19:22 UTCEPSS rescore
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  20. 2026-06-18 17:49 UTCEPSS rescore
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  29. 2026-06-13 22:57 UTCEPSS rescore
  30. 2026-06-12 23:08 UTCEPSS rescore
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  44. 2026-06-01 13:49 UTCEPSS rescore
  45. 2026-06-01 13:49 UTCEPSS rescore
  46. 2026-05-31 22:28 UTCEPSS rescore
  47. 2026-05-31 22:28 UTCEPSS rescore
  48. 2026-05-31 00:13 UTCEPSS rescore
  49. 2026-05-31 00:13 UTCEPSS rescore
  50. 2026-05-30 17:46 UTCEG score recompute
  51. 2026-05-30 17:46 UTCGHSA enrichment
  52. 2026-05-29 13:40 UTCEPSS rescore
  53. 2026-05-28 13:42 UTCEPSS rescore
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  55. 2026-05-28 13:42 UTCEPSS rescore
  56. 2026-05-27 13:38 UTCEPSS rescore
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  58. 2026-05-26 13:41 UTCEPSS rescore
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  60. 2026-05-26 07:16 UTCEPSS rescore
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  62. 2026-05-22 21:15 UTCEPSS rescore
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  64. 2026-05-20 22:37 UTCEPSS rescore
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  66. 2026-05-20 11:21 UTCEPSS rescore
  67. 2026-05-20 11:20 UTCEPSS rescore
  68. 2026-05-18 21:29 UTCEPSS rescore

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Frequently asked(4)

What is CVE-2009-0085?
CVE-2009-0085 is a high vulnerability published on March 10, 2009. The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client's key exchange data in Transport Layer Security…
When was CVE-2009-0085 disclosed?
CVE-2009-0085 was first published in the National Vulnerability Database on March 10, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-0085 actively exploited?
CVE-2009-0085 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15% probability of exploitation in the next 30 days, which ranks it in the top 3.6% of all scored CVEs.
How do I remediate CVE-2009-0085?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-0085, 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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