CVE-2026-80078: Microsoft Office Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information over a network.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80078
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-2026-800780.71% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-80078 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
Recent advisories for Microsoft Office 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-2026-85875: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-09-08
- mediumCVE-2026-83951: Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose informat…nvd · 2026-09-08
- mediumCVE-2026-83949: Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose informat…nvd · 2026-09-08
- mediumCVE-2026-81958: Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to dis…nvd · 2026-09-08
- mediumCVE-2026-81401: Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows…nvd · 2026-09-08
- mediumCVE-2026-81400: Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose infor…nvd · 2026-09-08
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