Quick answers
- Is CVE-2026-45457 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45457 being exploited in the wild.
- How severe is CVE-2026-45457?
- High severity, with a CVSS score of 7.8, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Word.
- Is there a fix for CVE-2026-45457?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-45457 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-45457?
- Check whether you run Microsoft Word. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A vulnerability classified as an untrusted pointer dereference (and associated with CWE-125 Out-of-bounds Read) exists in Microsoft Word. The flaw is triggered when the application processes a malformed document, leading to memory corruption. An attacker can exploit this by convincing a user to open a malicious file, resulting in arbitrary code execution within the context of the logged-in user. The attack vector is local, but requires user interaction (UI:R). Microsoft has released information regarding this vulnerability via their Security Update Guide.
Affected products
- Microsoft Word
Timeline
- 2026-06-09: disclosed
- 2026-06-09: advisory: Published by Microsoft and NVD