CVE-2026-55123
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
A heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
Risk Assessment
An attacker can gain full control of the victim's system, leading to data theft, malware installation, or further propagation within the network.
Recommendation
Apply the security update provided by Microsoft for PowerPoint immediately and consider implementing policies that restrict the execution of macros and attachments from unknown sources.
Other vulnerabilities in Microsoft Office PowerPoint
See all- CVE-2026-88178Critical
Use-after-free vulnerability in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
- CVE-2026-108455Medium
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
- CVE-2026-108454Medium
Buffer over-read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
- CVE-2026-108453Medium
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
- CVE-2026-97744Medium
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally. The attacker can read data outside the intended memory bounds.
- CVE-2026-97005Medium
Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
- CVE-2026-88207High
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
- CVE-2026-88203Medium
An untrusted pointer dereference in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
- CVE-2026-88183Medium
An out-of-bounds read vulnerability in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information over a network.
- CVE-2026-88144High
A use after free vulnerability in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a network.
Original NVD description (English source)
Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS