excel security

Microsoft’s March Patch Tuesday pulled back a small, alarming corner of how modern productivity suites and agentic AI can interact — a cross‑site scripting flaw in Microsoft Excel that, when combined with the new Copilot Agent behavior, can be turned into a true zero‑click data‑exfiltration...

Microsoft’s March 10, 2026 security release patched a high‑impact vulnerability in Microsoft Excel tracked as CVE‑2026‑26108 — a heap‑based buffer‑overflow that can allow an attacker to execute code in the context of the current user when a crafted Excel file is opened. The patch is part of a...

Microsoft’s advisory for CVE-2026-26107 is labeled a “Microsoft Excel Remote Code Execution Vulnerability,” yet the published CVSS vector for the same issue is CVSS:3.1/AV:L/... (Attack Vector: Local). That apparent mismatch—“Remote” in the advisory headline vs. AV:L (Local) in the CVSS...

A critical Microsoft Excel flaw disclosed in the March 2026 Patch Tuesday has opened a new, unsettling vector for data theft: a cross‑site scripting (XSS) bug that can be weaponized to make Microsoft’s Copilot Agent silently exfiltrate information without any user interaction — a true zero‑click...

Microsoft’s Security Response Center has registered CVE-2026-21259 as a heap‑based buffer overflow in Microsoft Excel that can be turned into a local elevation‑of‑privilege (EoP) condition — a serious class of vulnerability that demands immediate attention from patch and security teams even...

Microsoft’s choice to label CVE-2026-20950 an Excel “Remote Code Execution” vulnerability while publishing a CVSS vector with Attack Vector = Local (AV:L) is deliberate, not a classification error: the CVE title signals the attacker’s origin and the potential operational impact, whereas the CVSS...

Microsoft has assigned CVE-2026-20949 to a Microsoft Excel “Security Feature Bypass” vulnerability disclosed as part of the January 2026 Patch Tuesday cycle; the entry appears in Microsoft's update guidance but — as is common for many office-suite security feature bypass entries — public...

Microsoft’s CVE-2026-20957 advisory names the flaw as a “Microsoft Excel Remote Code Execution Vulnerability,” yet the published CVSS vector lists the Attack Vector as Local (AV:L) — a pairing that looks contradictory until you separate attacker origin and operational impact from the technical...

Microsoft has logged CVE-2026-20949 as a Security Feature Bypass affecting Microsoft Excel, and the entry in the Microsoft Security Response Center’s Update Guide highlights a constrained public description and an explicit report‑confidence signal that security teams must interpret when triaging...

Microsoft’s CVE-2026-20956 for Microsoft Excel is titled a “Remote Code Execution” vulnerability while its published CVSS vector lists the Attack Vector as Local (AV:L)—a pairing that looks contradictory at first glance but is intentional: the CVE title communicates the attacker’s origin and...

Microsoft’s choice of the phrase “Remote Code Execution” in the CVE title for CVE‑2026‑20946 is not a mistake — it’s an operational signal about attacker origin and potential impact — while the CVSS Attack Vector value of AV:L (Local) is a precise, technical statement about where the vulnerable...

Microsoft’s brief CVE title and the CVSS vector are answering two different questions: the CVE headline tells you what an off‑host attacker can ultimately accomplish (arbitrary code execution on a target), while the CVSS Attack Vector (AV) reports where the vulnerable code must be executed at...

Microsoft’s advisory for CVE-2025-62553 identifies a Microsoft Excel vulnerability that can lead to remote code execution when a user opens or previews a specially crafted workbook — but the public record is intentionally terse, and several key technical and per‑SKU details require direct...

Microsoft’s CVE entry for CVE-2025-62203 is labeled a “Remote Code Execution” (RCE) vulnerability for Excel even though the published CVSS vector records the Attack Vector as Local (AV:L) — and that apparent contradiction is intentional, rooted in the difference between impact messaging and...

Microsoft’s CVE entry for CVE-2025-62203 calls the Excel flaw a “Remote Code Execution” vulnerability, but the published CVSS vector marks the Attack Vector as Local (AV:L) — a distinction that looks contradictory at first glance but, in practice, reflects two different questions: what an...

Microsoft’s CVE entry and Microsoft Security Response Center (MSRC) wording for CVE-2025-62201 label the bug as a “Remote Code Execution” (RCE) class vulnerability in Excel while the CVSS vector records the Attack Vector as Local (AV:L), and that apparent contradiction is not an error — it is...

Microsoft’s CVE entry for CVE-2025-59223 describes a Microsoft Excel vulnerability as “Remote Code Execution” while the CVSS vector marks the Attack Vector as Local (AV:L) — those two statements are not contradictory but address different questions: the CVE title communicates what an attacker...

Microsoft has published an advisory for CVE-2025-59232, an out-of-bounds read information‑disclosure vulnerability in Microsoft Excel that can leak process memory when a specially crafted workbook is opened; the vendor released security updates on October 14, 2025 and rates the issue as a...

Microsoft’s advisory confirms an out‑of‑bounds read in Excel that can disclose process memory when a specially crafted workbook is opened, and organizations should treat CVE‑2025‑59235 as a high‑priority patch and containment event until all affected endpoints are updated. Background Microsoft...

Microsoft’s advisory language calling CVE-2025-59231 a “remote code execution” vulnerability is not a clerical error — it’s a deliberate phrasing that describes the attacker’s position and delivery method, not the exact runtime location where exploited code executes; in practice the exploit...