CVE-2026-70257
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk56th percentile - higher than 56% of all known CVEs
Summary
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker can execute malicious code on the victim's machine, potentially leading to system compromise.
Recommendation
Install the latest security updates for Microsoft Office.
Other vulnerabilities in Microsoft Office Outlook
See all- CVE-2026-97749Critical
Microsoft Office Outlook is affected by a double free vulnerability. This allows an unauthorized attacker to execute code over a network.
- CVE-2026-97016Critical
Microsoft Office Outlook is affected by a heap-based buffer overflow vulnerability. This allows an unauthorized attacker to execute code over a network.
- CVE-2026-88156Critical
Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-70291Critical
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-70242Critical
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-78509Critical
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-108448High
A heap-based buffer overflow in Microsoft Office Outlook allows an unauthenticated attacker to execute code over a network. The vulnerability occurs when processing specially crafted data.
- CVE-2026-97012High
Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-70282High
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
- CVE-2026-70281High
Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.
Original NVD description (English source)
Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS