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
98.2%
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 85× in last 7d / 375× 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 497 total refreshes for this CVE.

  1. 2026-07-07 06:06 UTCEG score recompute
  2. 2026-07-07 06:06 UTCGHSA enrichment
  3. 2026-07-07 01:52 UTCEG score recompute
  4. 2026-07-07 01:51 UTCGHSA enrichment
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  16. 2026-07-06 00:14 UTCGHSA enrichment
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  20. 2026-07-05 15:44 UTCGHSA enrichment
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  1. 2026-07-05 02:59 UTCGHSA enrichment
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  9. 2026-07-04 10:02 UTCGHSA enrichment
  10. 2026-07-04 06:27 UTCEPSS rescore
  11. 2026-07-04 05:47 UTCEG score recompute
  12. 2026-07-04 05:47 UTCGHSA enrichment
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  14. 2026-07-04 01:31 UTCGHSA enrichment
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  18. 2026-07-03 17:02 UTCGHSA enrichment
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  22. 2026-07-03 08:32 UTCGHSA enrichment
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  26. 2026-07-03 00:00 UTCGHSA enrichment
  27. 2026-07-02 19:45 UTCEG score recompute
  28. 2026-07-02 19:45 UTCGHSA enrichment
  29. 2026-07-02 15:31 UTCEG score recompute
  30. 2026-07-02 15:31 UTCGHSA enrichment
  31. 2026-07-02 15:21 UTCEPSS rescore
  32. 2026-07-02 11:17 UTCEG score recompute
  33. 2026-07-02 11:16 UTCGHSA enrichment
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  35. 2026-07-02 07:02 UTCGHSA enrichment
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  37. 2026-07-02 02:47 UTCGHSA enrichment
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  39. 2026-07-01 22:33 UTCGHSA enrichment
  40. 2026-07-01 19:16 UTCCISA KEV update
  41. 2026-07-01 18:17 UTCEG score recompute
  42. 2026-07-01 18:17 UTCGHSA enrichment
  43. 2026-07-01 15:02 UTCEPSS rescore
  44. 2026-07-01 15:02 UTCEPSS rescore
  45. 2026-07-01 14:02 UTCEG score recompute
  46. 2026-07-01 14:02 UTCGHSA enrichment
  47. 2026-07-01 09:47 UTCEG score recompute
  48. 2026-07-01 09:47 UTCGHSA enrichment
  49. 2026-07-01 05:30 UTCEG score recompute
  50. 2026-07-01 05:30 UTCGHSA enrichment
  51. 2026-07-01 01:15 UTCEG score recompute
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  53. 2026-06-30 21:01 UTCEG score recompute
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  55. 2026-06-30 16:46 UTCEG score recompute
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  65. 2026-06-29 19:30 UTCEG score recompute
  66. 2026-06-29 19:30 UTCGHSA enrichment
  67. 2026-06-29 19:12 UTCCISA KEV update
  68. 2026-06-29 15:16 UTCEG score recompute
  69. 2026-06-29 15:15 UTCGHSA enrichment
  70. 2026-06-29 10:58 UTCEG score recompute
  71. 2026-06-29 10:58 UTCGHSA enrichment
  72. 2026-06-29 06:44 UTCEG score recompute
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  74. 2026-06-29 02:29 UTCEG score recompute
  75. 2026-06-29 02:29 UTCGHSA enrichment

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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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