CVE-2026-44822: Microsoft Excel Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
CSIRTS triage
- What
- Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
- Who is affected
- Users of Microsoft Excel.
- Urgency
- Remediation is urgent due to the high severity and risk of information disclosure.
- Action
- Apply the latest security updates for Microsoft Excel.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44822
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-448220.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-44822 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Microsoft Excel Information
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-70328: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-70327: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-70318: Improper input validation in Microsoft Office Excel allows an unauthorized attacker to disclos…nvd · 2026-08-11
- mediumCVE-2026-68813: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-68808: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
- mediumCVE-2026-68802: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-08-11
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