CVE-2026-88153
MediumCVSS 6.5Exploitation Probability (EPSS)
Elevated risk57th percentile - higher than 57% of all known CVEs
Summary
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Risk Assessment
An unauthenticated attacker can remotely trigger a memory data leak, potentially leading to disclosure of sensitive information.
Recommendation
Apply the latest Microsoft Office security updates and avoid opening untrusted files.
Other vulnerabilities in Microsoft Office Excel
See all- CVE-2026-40360High
An out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVE-2026-40359High
A use after free vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20957High
Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20956High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20955High
Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20950High
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-20949High
Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.
- CVE-2026-20946High
An out-of-bounds read vulnerability in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
- CVE-2026-97780High
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
- CVE-2026-97779Medium
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network. The attacker can read data outside the intended memory bounds.
Original NVD description (English source)
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS