CVE-2019-0540 Security feature bypass in Microsoft Excel Viewer
Attackers can bypass URL validation in Microsoft Office to trick users into entering credentials, leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-0540?
CVE-2019-0540 is a medium-severity vulnerability in Microsoft Excel Viewer, published on 6 Mar 2019. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
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'.
Weakness: CWE-601
Which versions are affected by CVE-2019-0540?
It affects 5 products.
Products include Microsoft Excel Viewer, Microsoft Office, Microsoft Office 365 Proplus, Microsoft Powerpoint Viewer, Microsoft Word Viewer.
How do I fix CVE-2019-0540?
No fix has been published for CVE-2019-0540 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-0540 being exploited?
There is no known exploitation of CVE-2019-0540 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Excel Viewer
Sources
Also known as GHSA-64wm-87jc-34mv.