CVE-2017-11774

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 2021-11-03), 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 — 5 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: 60%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.

Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security Feature Bypass 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
60%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

October 13, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated May 19, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, 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-2017-11774
generic

SensePost | Outlook Home Page – Another Ruler Vector

https://sensepost.com/blog/2017/outlook-home-page-another-ruler-vector/
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11774
generic
http://www.securitytracker.com/id/1039542
generic
http://www.securityfocus.com/bid/101098

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 90× in last 7d / 385× 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 1,278 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2017-11774?
CVE-2017-11774 is a critical vulnerability published on October 13, 2017. Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security Feature Bypass Vulnerability."
When was CVE-2017-11774 disclosed?
CVE-2017-11774 was first published in the National Vulnerability Database on October 13, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-11774 actively exploited?
Yes. CISA added CVE-2017-11774 to the Known Exploited Vulnerabilities catalog on November 3, 2021, affecting Microsoft Office. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-11774?
CVE-2017-11774 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-2017-11774?
CVE-2017-11774 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-2017-11774?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-11774, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2017-11774

Explore →

Is Your Infrastructure Affected by CVE-2017-11774?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs