Threats / Microsoft / CVE-2017-11774
CVE-2017-11774
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Office vulnerability
Microsoft Office Outlook security feature bypass via improper memory object handling enables remote command execution.
Verdict
Today item — known-exploited.
CVE-2017-11774 is a memory corruption vulnerability in Outlook that circumvents security controls, allowing attackers to execute arbitrary commands on affected systems. Active exploitation in the wild increases risk.
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Public proof-of-concept exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
6 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03).
Probability (EPSS)
EPSS 0.59893 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, Office. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-119 Memory Buffer Bounds Error — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious Office document or email attachment that exploits improper memory handling in Outlook.
Business
End users receive weaponized content that bypasses email security filters and Outlook protections.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I trigger the vulnerability when the user opens or previews the malicious content in Outlook.
Business
Attackers gain code execution on user workstations with the privileges of the Outlook process.
3
Lateral reach — past segmentation narrative 3
Attacker
I execute arbitrary commands to establish persistence, steal credentials, or deploy secondary payloads.
Business
Organizations face data exfiltration, lateral movement, and potential system compromise across the network.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05