CVE-2015-1770

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 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: 35%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."

CVSS v3
8.8
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
35%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

June 10, 2015

Last Modified

April 22, 2026

Advisory Details (3)

Auto-updated May 2, 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-2015-1770
generic

Microsoft Security Bulletin MS15-059 - Important | Microsoft Learn

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-059
generic
http://www.securityfocus.com/bid/75016

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 55× in last 7d / 228× 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 832 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2015-1770?
CVE-2015-1770 is a critical vulnerability published on June 10, 2015. Microsoft Office 2013 SP1 and 2013 RT SP1 allows remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Uninitialized Memory Use Vulnerability."
When was CVE-2015-1770 disclosed?
CVE-2015-1770 was first published in the National Vulnerability Database on June 10, 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-2015-1770 actively exploited?
Yes. CISA added CVE-2015-1770 to the Known Exploited Vulnerabilities catalog on March 28, 2022, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2015-1770?
CVE-2015-1770 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2015-1770?
CVE-2015-1770 affects Microsoft Office. 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-2015-1770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-1770, 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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