Threats / Microsoft / CVE-2019-0541
CVE-2019-0541
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Microsoft MSHTML vulnerability
Microsoft MSHTML engine contains an improper input validation vulnerability enabling remote code execution. The flaw has been exploited in the wild.
Verdict
Today item — known-exploited.
CVE-2019-0541 is a remote code execution vulnerability in MSHTML resulting from improper input validation. Active exploitation in the wild and high EPSS score indicate significant risk to systems running affected Microsoft products.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
1 independent public report 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 0.53202 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Microsoft, MSHTML. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-77 Command Injection — weakness family: Injection.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 malicious HTML content designed to bypass input validation in the MSHTML engine.
Business
Attackers gain ability to execute arbitrary code on victim systems through browser rendering or Office document processing.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I deliver the malicious content via email, web pages, or compromised documents to target users.
Business
Widespread compromise of endpoints becomes possible without user awareness or additional exploitation steps.
3
Lateral reach — past segmentation narrative 3
Attacker
I establish code execution context to install malware, steal credentials, or pivot to network resources.
Business
Organizations face data breaches, system compromise, and potential lateral movement within corporate networks.
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