CVE-2015-1770

HIGHNVD 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
8.8
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS: 35%CVSS: 8.8Exploit: NoneExposed: 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)
EPSS
98.3%
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 56× in last 7d / 216× 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 404 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2015-1770?
CVE-2015-1770 is a high 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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