Quick answers
- Is CVE-2026-44822 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-44822 being exploited in the wild.
- How severe is CVE-2026-44822?
- High severity, with a CVSS score of 8.2, published 9 June 2026.
- Which products and versions are affected?
- Microsoft Excel.
- Is there a fix for CVE-2026-44822?
- 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-2026-44822 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-44822?
- Check whether you run Microsoft Excel. 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 classified as an out-of-bounds read (CWE-125) within Microsoft Office Excel. The flaw occurs when the application reads data past the end of the intended buffer, which can be triggered by a remote, unauthenticated attacker over a network. According to the CVSS metrics, the attack requires no special privileges and no user interaction, making it highly accessible. Successful exploitation results in high confidentiality impact, allowing the attacker to disclose memory contents or sensitive information from the affected system. Microsoft has released information regarding this vulnerability via their Security Update Guide.
Affected products
- Microsoft Excel
Timeline
- 2026-06-09: disclosed: Initial publication of the CVE record.
- 2026-06-09: advisory: Microsoft released the security advisory.