CVE-2019-0540
Exploitation likely. EPSS gives it a 13% chance of exploitation in the next 30 days. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
A security feature bypass vulnerability exists when Microsoft Office does not validate URLs.An attacker could send a victim a specially crafted file, which could trick the victim into entering credentials, aka 'Microsoft Office Security Feature Bypass Vulnerability'.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
13% chance of exploitation activity in the next 30 days, which ranks it in the 96th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
- Attention now
Rising.
Lifecycle
22 events over 2758 days, from the signal feeds we watch.
- EPSS band changelow → moderateepss band change
- EPSS band changemoderate → lowepss band change
- EPSS band change0 → moderateepss band change
- EPSS band changemoderate → 0epss band change
- EPSS band change0 → moderateepss band change
- EPSS band changemoderate → 0epss band change
Affected products
- excel viewerOSS Libraries / generic-library
- Microsoft Office 2010 Service Pack 2Consumer Software / productivity
- Office 365 ProPlusConsumer Software / productivity
- powerpoint viewerConsumer Software / productivity
- word viewerConsumer Software / productivity
- Microsoft Excel ViewerConsumer Software / productivity
- Microsoft Office 2013 RT Service Pack 1Operating Systems
- Microsoft Office Word ViewerOperating Systems / windows
And 12 more affected products. See all after sign-in
Technical detail
CVSS 3.0 vector
Open in the CVSS calculatorCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Scored 5.5 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction RequiredA user must click a link, open a file, or perform some action
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality NoneNo confidentiality impact
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1566Phishingmedium confidence
Sources
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