CVE-2015-1671

CRITICALNVD 7.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-25), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 55%CVSS: 7.8Exploit: cisa kev · ssvc active · epss top5pct · epss highExposed: 0

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

The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2; Office 2007 SP3 and 2010 SP2; Live Meeting 2007 Console; Lync 2010; Lync 2010 Attendee; Lync 2013 SP1; Lync Basic 2013 SP1; Silverlight 5 before 5.1.40416.00; and Silverlight 5 Developer Runtime before 5.1.40416.00, allows remote attackers to execute arbitrary code via a crafted TrueType font, aka "TrueType Font Parsing Vulnerability."

CVSS v3
7.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
55%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

May 13, 2015

Last Modified

April 22, 2026

Advisory Details (4)

Auto-updated May 19, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1671
generic

Microsoft Security Bulletin MS15-044 - Critical | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-044
generic
http://www.securitytracker.com/id/1032281
generic
http://www.securityfocus.com/bid/74490

Data Freshness Timeline

(refreshed 62× in last 7d / 222× 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 664 total refreshes for this CVE.

  1. 2026-08-21 23:44 UTCEPSS rescore
  2. 2026-08-21 22:47 UTCGHSA enrichment
  3. 2026-08-21 18:58 UTCGHSA enrichment
  4. 2026-08-21 16:49 UTCCISA KEV update
  5. 2026-08-21 15:09 UTCGHSA enrichment
  6. 2026-08-21 11:20 UTCGHSA enrichment
  7. 2026-08-21 07:31 UTCGHSA enrichment
  8. 2026-08-21 03:42 UTCGHSA enrichment
  9. 2026-08-20 23:54 UTCEG score recompute
  10. 2026-08-20 23:54 UTCGHSA enrichment
  11. 2026-08-20 22:50 UTCEPSS rescore
  12. 2026-08-20 20:06 UTCGHSA enrichment
  13. 2026-08-20 17:06 UTCCISA KEV update
  14. 2026-08-20 16:18 UTCGHSA enrichment
  15. 2026-08-20 12:30 UTCGHSA enrichment
  16. 2026-08-20 08:42 UTCGHSA enrichment
  17. 2026-08-20 04:54 UTCGHSA enrichment
  18. 2026-08-20 01:05 UTCGHSA enrichment
  19. 2026-08-19 21:17 UTCGHSA enrichment
  20. 2026-08-19 17:33 UTCCISA KEV update
  21. 2026-08-19 17:28 UTCEG score recompute
  22. 2026-08-19 17:28 UTCGHSA enrichment
  23. 2026-08-19 16:59 UTCEPSS rescore
  24. 2026-08-19 13:39 UTCGHSA enrichment
  25. 2026-08-19 09:48 UTCGHSA enrichment
Show 75 more
  1. 2026-08-19 05:59 UTCGHSA enrichment
  2. 2026-08-19 02:09 UTCGHSA enrichment
  3. 2026-08-18 22:21 UTCGHSA enrichment
  4. 2026-08-18 18:32 UTCGHSA enrichment
  5. 2026-08-18 16:58 UTCCISA KEV update
  6. 2026-08-18 14:43 UTCEG score recompute
  7. 2026-08-18 14:43 UTCGHSA enrichment
  8. 2026-08-18 13:43 UTCEPSS rescore
  9. 2026-08-18 10:52 UTCGHSA enrichment
  10. 2026-08-18 07:02 UTCGHSA enrichment
  11. 2026-08-18 03:13 UTCGHSA enrichment
  12. 2026-08-17 23:23 UTCGHSA enrichment
  13. 2026-08-17 19:34 UTCGHSA enrichment
  14. 2026-08-17 15:46 UTCEG score recompute
  15. 2026-08-17 15:46 UTCGHSA enrichment
  16. 2026-08-17 13:56 UTCCISA KEV update
  17. 2026-08-17 11:58 UTCGHSA enrichment
  18. 2026-08-17 08:10 UTCGHSA enrichment
  19. 2026-08-17 04:22 UTCGHSA enrichment
  20. 2026-08-17 00:34 UTCGHSA enrichment
  21. 2026-08-16 20:46 UTCGHSA enrichment
  22. 2026-08-16 16:58 UTCEG score recompute
  23. 2026-08-16 16:58 UTCGHSA enrichment
  24. 2026-08-16 14:51 UTCEPSS rescore
  25. 2026-08-16 13:10 UTCGHSA enrichment
  26. 2026-08-16 09:21 UTCGHSA enrichment
  27. 2026-08-16 05:33 UTCEG score recompute
  28. 2026-08-16 05:33 UTCGHSA enrichment
  29. 2026-08-16 02:09 UTCEPSS rescore
  30. 2026-08-16 01:45 UTCGHSA enrichment
  31. 2026-08-15 21:57 UTCGHSA enrichment
  32. 2026-08-15 18:09 UTCGHSA enrichment
  33. 2026-08-15 14:21 UTCGHSA enrichment
  34. 2026-08-15 10:33 UTCGHSA enrichment
  35. 2026-08-15 06:45 UTCGHSA enrichment
  36. 2026-08-15 02:57 UTCEG score recompute
  37. 2026-08-15 02:57 UTCGHSA enrichment
  38. 2026-08-15 01:25 UTCEPSS rescore
  39. 2026-08-14 23:09 UTCGHSA enrichment
  40. 2026-08-14 19:21 UTCGHSA enrichment
  41. 2026-08-14 15:33 UTCGHSA enrichment
  42. 2026-08-14 11:45 UTCGHSA enrichment
  43. 2026-08-14 07:57 UTCGHSA enrichment
  44. 2026-08-14 04:09 UTCGHSA enrichment
  45. 2026-08-14 00:21 UTCGHSA enrichment
  46. 2026-08-13 20:32 UTCGHSA enrichment
  47. 2026-08-13 16:44 UTCGHSA enrichment
  48. 2026-08-13 12:56 UTCGHSA enrichment
  49. 2026-08-13 09:08 UTCGHSA enrichment
  50. 2026-08-13 05:20 UTCGHSA enrichment
  51. 2026-08-13 01:32 UTCGHSA enrichment
  52. 2026-08-12 21:44 UTCGHSA enrichment
  53. 2026-08-12 17:56 UTCGHSA enrichment
  54. 2026-08-12 14:08 UTCEG score recompute
  55. 2026-08-12 14:08 UTCGHSA enrichment
  56. 2026-08-12 13:46 UTCEPSS rescore
  57. 2026-08-12 10:20 UTCGHSA enrichment
  58. 2026-08-12 06:31 UTCGHSA enrichment
  59. 2026-08-12 02:43 UTCGHSA enrichment
  60. 2026-08-11 22:54 UTCGHSA enrichment
  61. 2026-08-11 19:32 UTCCISA KEV update
  62. 2026-08-11 19:06 UTCGHSA enrichment
  63. 2026-08-11 15:18 UTCEG score recompute
  64. 2026-08-11 15:18 UTCGHSA enrichment
  65. 2026-08-11 11:29 UTCGHSA enrichment
  66. 2026-08-11 07:41 UTCGHSA enrichment
  67. 2026-08-11 03:53 UTCGHSA enrichment
  68. 2026-08-11 00:05 UTCGHSA enrichment
  69. 2026-08-10 20:17 UTCGHSA enrichment
  70. 2026-08-10 16:29 UTCGHSA enrichment
  71. 2026-08-10 12:40 UTCGHSA enrichment
  72. 2026-08-10 08:52 UTCGHSA enrichment
  73. 2026-08-10 05:04 UTCGHSA enrichment
  74. 2026-08-10 01:16 UTCGHSA enrichment
  75. 2026-08-09 21:28 UTCGHSA enrichment

Frequently asked(6)

What is CVE-2015-1671?
CVE-2015-1671 is a critical vulnerability published on May 13, 2015. The Windows DirectWrite library, as used in Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2; Office 2007 SP3 and 2010 SP2; Live Meeting 2007 Console; Lync 2010; Lync 2010 Attendee; Lync 2013 SP1; Lync Basic 2013 SP1; Silverlight 5 before 5.1.40416.00; and Silverlight 5…
When was CVE-2015-1671 disclosed?
CVE-2015-1671 was first published in the National Vulnerability Database on May 13, 2015, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-1671 actively exploited?
Yes. CISA added CVE-2015-1671 to the Known Exploited Vulnerabilities catalog on May 25, 2022, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2015-1671?
CVE-2015-1671 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2015-1671?
CVE-2015-1671 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2015-1671?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-1671, 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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