Quick answers
- Is CVE-2026-80089 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-80089 being exploited in the wild.
- How severe is CVE-2026-80089?
- Medium severity, with a CVSS score of 6.5, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Office.
- Is there a fix for CVE-2026-80089?
- 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-2026-80089 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-80089?
- Check whether you run Microsoft Office. 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
This vulnerability is an out-of-bounds read flaw in Microsoft Office that enables information disclosure over a network. The vulnerability likely exists in document parsing or rendering logic that fails to properly validate buffer boundaries before reading memory. An attacker can craft a malicious Office document and send it to a target user, requiring user interaction (opening the document) to trigger the exploit. Successful exploitation allows the attacker to read arbitrary memory and disclose sensitive information from the affected process. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Office
Timeline
- 2026-09-08: disclosed