Quick answers
- Is CVE-2026-45643 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45643 being exploited in the wild.
- How severe is CVE-2026-45643?
- High severity, with a CVSS score of 7.8, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Office Word.
- Is there a fix for CVE-2026-45643?
- 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-2026-45643 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-45643?
- 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 (CWE-822) exists in Microsoft Office Word. The flaw occurs when the application processes a malformed document containing an invalid pointer, which an attacker can leverage to gain control of the execution flow. While the attack vector is local, it requires user interaction, such as opening a malicious file. If successfully exploited, an attacker can achieve arbitrary code execution with the privileges of the logged-in user. Microsoft has released information regarding this vulnerability via their Security Update Guide.
Affected products
- Microsoft Office Word
Timeline
- 2026-06-09: disclosed
- 2026-06-09: advisory