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 59× in last 7d / 211× 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 620 total refreshes for this CVE.

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