Open Redirect in Microsoft Excel Viewer
CVE-2019-0540
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'.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.128 (96.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.128 · newest: 0.128 · change: 0.000
Affected products
- Microsoft Excel Viewer
- Microsoft Excel Viewer — versions unspecified
- Microsoft Office — versions 2010 Service Pack 2 (32-bit editions), 2010 Service Pack 2 (64-bit editions), 2013 Service Pack 1 (32-bit editions)
- Microsoft Office Compatibility Pack — versions Service Pack 3
- Microsoft Powerpoint Viewer — versions unspecified
- Microsoft Office — versions 2010, 2013, 2016
- Microsoft Office 365 Proplus — versions 32-bit Systems, 64-bit Systems
- Microsoft Office 365 Proplus
- Microsoft Powerpoint Viewer
- Microsoft Word Viewer
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/106863 (VDB Entry, Third Party Advisory, vdb-entry)
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0540 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2019-0540?
- CVE-2019-0540 is a medium-severity vulnerability in Microsoft Excel Viewer, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.5/10. Published 2019-03-05.
- How severe is CVE-2019-0540?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-0540 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.