excel security

Microsoft has listed CVE-2026-40362 as a Microsoft Excel remote code execution vulnerability in its Security Update Guide, with the public record emphasizing confidence in the vulnerability’s existence and the credibility of available technical details rather than disclosing a full exploit...

Microsoft listed CVE-2026-40359 as a Microsoft Excel remote code execution vulnerability in the Security Update Guide, making it an Office-family patching issue for Windows and Microsoft 365 environments where malicious spreadsheet files can plausibly become the delivery mechanism for code...

CVE-2026-40360 is a Microsoft Excel information disclosure vulnerability published in Microsoft’s Security Update Guide on May 12, 2026, affecting Excel users who process untrusted workbooks and requiring administrators to evaluate Office updates through the same Patch Tuesday machinery used for...

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...