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 9 y ago 2017-10-13 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.8

v3.1 · CNA

CISA KEV

Yes

added 2021-11-03

EPSS

59.6%

percentile 99%

Public exploits

none known

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."

Known exploited (CISA KEV)

Added: 5 y ago 2021-11-03
Due date: 2022-05-03 (4 y ago)
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Vendor / product: Microsoft / Office
CISA name: Microsoft Office Outlook Security Feature Bypass Vulnerability

CISA SSVC assessment

Exploitation: Active — exploited in the wild
Automatable: no
Technical impact: total
Assessed: 20 mo ago 2025-02-10

Exploit prediction (EPSS)

59.63% probability of exploitation in the next 30 days, higher than 99% of all scored CVEs.

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

portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2017-11774 · x_refsource_CONFIRM, x_transferred
securityfocus.com /bid/101098 · vdb-entry, x_refsource_BID, x_transferred
securitytracker.com /id/1039542 · vdb-entry, x_refsource_SECTRACK, x_transferred
sensepost.com /blog/2017/outlook-home-page-another-ruler-vector/ · x_refsource_MISC, x_transferred
cisa.gov /known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11774 · government-resource

Sources

CVE List: CVE-2017-11774
NVD: CVE-2017-11774

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary