CISA Known Exploited Vulnerabilities Directory

Explore every threat in the CISA Known Exploited Vulnerabilities (KEV) catalog, enhanced with plain-English executive analysis, AWS relevance, and technical remediation guidance.

Showing 1–10 of 29 records

CVE Vendor Product Added Due Status
CVE-2009-0238 — Microsoft Office Remote Code Execution
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.
Microsoft Office Apr 14, 2026 Apr 28, 2026
CVE-2026-21514 — Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability
Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally.
Microsoft Office Feb 10, 2026 Mar 3, 2026
CVE-2026-21509 — Microsoft Office Security Feature Bypass Vulnerability
Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.
Microsoft Office Jan 26, 2026 Feb 16, 2026
CVE-2009-0556 — Microsoft Office PowerPoint Code Injection Vulnerability
Microsoft Office PowerPoint contains a code injection vulnerability that allows remote attackers to execute arbitrary code via a PowerPoint file with an OutlineTextRefAtom containing an invalid index value that triggers memory corruption.
Microsoft Office Jan 7, 2026 Jan 28, 2026
CVE-2007-0671 — Microsoft Office Excel Remote Code Execution Vulnerability
Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened. This malicious file could be delivered as an email attachment or hosted on a malicious website. An attacker could leverage this vulnerability by creating a specially crafted Excel file, which, when opened, allowing an attacker to execute remote code on the affected system.
Microsoft Office Aug 12, 2025 Sep 2, 2025
CVE-2023-23397 — Microsoft Office Outlook Privilege Escalation Vulnerability
Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.
Microsoft Office Mar 14, 2023 Apr 4, 2023
CVE-2023-21715 — Microsoft Office Publisher Security Feature Bypass Vulnerability
Microsoft Office Publisher contains a security feature bypass vulnerability that allows for a local, authenticated attack on a targeted system.
Microsoft Office Feb 14, 2023 Mar 7, 2023
CVE-2009-0557 — Microsoft Office Object Record Corruption Vulnerability
Microsoft Office contains an object record corruption vulnerability that allows remote attackers to execute code via a crafted Excel file with a malformed record object.
Microsoft Office Jun 8, 2022 Jun 22, 2022
CVE-2009-0563 — Microsoft Office Buffer Overflow Vulnerability
Microsoft Office contains a buffer overflow vulnerability that allows remote attackers to execute code via a Word document with a crafted tag containing an invalid length field.
Microsoft Office Jun 8, 2022 Jun 22, 2022
CVE-2013-1331 — Microsoft Office Buffer Overflow Vulnerability
Microsoft Office contains a buffer overflow vulnerability that allows remote attackers to execute code via crafted PNG data in an Office document.
Microsoft Office Jun 8, 2022 Jun 22, 2022

CVE-2026-21509 — Microsoft Office Security Feature Bypass Vulnerability

Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.

Office · Jan 26, 2026

CVE-2007-0671 — Microsoft Office Excel Remote Code Execution Vulnerability

Microsoft Office Excel contains a remote code execution vulnerability that can be exploited when a specially crafted Excel file is opened. This malicious file could be delivered as an email attachment or hosted on a malicious website. An attacker could leverage this vulnerability by creating a specially crafted Excel file, which, when opened, allowing an attacker to execute remote code on the affected system.

Office · Aug 12, 2025