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Fencer Intel
high 7.8

CVE-2017-11774 kev in the critical feed json

Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Micro…

published 9y ago modified 4mo ago also EUVD-2017-3382

cvss
7.8
version 3.1, CNA
cisa kev
Exploited
added 2021-11-03
epss
59.6%
EPSS 59.6% chance of exploitation in 30 days, percentile 99.1%
public exploits
0
none known

Summary

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."

Patch / fix

cisa required action Apply updates per vendor instructions.

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Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
5y ago
Patch by
2022-05-03 (4y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
Microsoft, Office
CISA name
Microsoft Office Outlook Security Feature Bypass Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
last yr.

Exploit prediction

59.63% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • sensepost.com https://sensepost.com/blog/2017/outlook-home-page-another-ruler-vector/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Microsoft Corporation Microsoft Outlook

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.