Quick answers
- Is CVE-2026-45466 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-45466 being exploited in the wild.
- How severe is CVE-2026-45466?
- Low severity, with a CVSS score of 3.3, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Word.
- Is there a fix for CVE-2026-45466?
- 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-2026-45466 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-45466?
- 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 heap-based buffer overflow (CWE-122) exists in Microsoft Word. The vulnerability is triggered when the application processes a malformed document, leading to an out-of-bounds memory read. An attacker can exploit this by tricking a user into opening a malicious file, which could result in the disclosure of sensitive information from the process memory. The attack vector is local and requires user interaction (UI:R), with a CVSS base score of 3.3 indicating low impact on confidentiality and no impact on integrity or availability.
Affected products
- Microsoft Word
Timeline
- 2026-06-09: disclosed
- 2026-06-09: advisory