Threats / Microsoft / CVE-2018-0802
CVE-2018-0802
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft Office vulnerability
Microsoft Office memory corruption vulnerability enabling remote code execution. Exploited in the wild with high EPSS score. Chained with CVE-2018-0798 in attacks.
Verdict
Today item — known-exploited.
Out-of-bounds write in Office object handling allows unauthenticated remote attackers to execute arbitrary code with user privileges. Active exploitation observed. Requires user interaction to trigger.
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
54 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 0.93289 — 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-787 Out-of-bounds Write — 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
Craft malicious Office document triggering memory corruption during object deserialization
Business
User opens document and attacker gains code execution in Office process context
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
Chain with CVE-2018-0798 to escalate privileges or bypass security boundaries
Business
Attacker pivots from Office sandbox to system-level compromise
3
Lateral reach — past segmentation narrative 3
Attacker
Distribute weaponized documents via email or file-sharing platforms
Business
Mass infection of enterprise endpoints running vulnerable Office versions
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