exchange server

Microsoft has cataloged CVE-2026-21527 as a Microsoft Exchange Server spoofing vulnerability in its Security Update Guide, but the public technical detail remains limited — a situation that demands urgent, pragmatic remediation while cautioning defenders against speculative technical...

Microsoft published the February 2026 Security Updates for Exchange Server and again urged administrators to apply them immediately — the rollup covers Exchange Server Subscription Edition (SE) RTM and, under Microsoft’s paid Extended Security Update (ESU) program, specific builds of Exchange...

No Exchange Server Security Updates for January 2026 — What on‑premise Exchange admins need to know and do now On January 13, 2026 Microsoft’s Exchange Team published a short but important bulletin: there are no security releases for any version of Exchange Server in January 2026. The post also...

Microsoft has cataloged a new elevation‑of‑privilege issue affecting Microsoft Exchange Server as CVE‑2025‑64666, a vulnerability vendors and trackers list as an Exchange Server elevation of privilege that requires immediate attention from administrators who run on‑premises or hybrid Exchange...

Microsoft has assigned CVE‑2025‑64667 to a newly recorded Microsoft Exchange Server vulnerability classified as a spoofing / UI misrepresentation issue; the MSRC entry and CVE aggregators show the advisory was published on December 9, 2025 and currently carries a medium severity (CVSS 3.1 ~5.3)...

The rise of enterprise AI in 2025 has shifted from academic promise to board‑level procurement: companies that once ran a handful of pilots are now making multi‑year commitments to cloud capacity, managed models, and agentic automation. An influential roundup published by Analytics Insight names...

Microsoft’s Exchange Team has confirmed that there are no security updates for any version of Exchange Server in November 2025, including Exchange Server Subscription Edition (SE) and Exchange Server 2016/2019 instances covered by the one‑time Extended Security Update (ESU) program; the team...

Upgrading your Exchange estate to the latest Cumulative Update (CU) is no longer a benign maintenance task — it’s an operational imperative tied to hybrid security, enforced service changes, and survival of rich coexistence features. This battle-tested, friendly guide walks you from inventory to...

Microsoft has quietly opened a conversation with on‑prem Exchange Server administrators about whether they would welcome Copilot-style AI features in locally hosted mail environments — and the survey’s most pointed question makes clear Microsoft is actively exploring hybrid approaches that could...

Microsoft’s latest push to "Copilot all the things" has landed squarely in the laps of Exchange Server administrators: Microsoft has circulated an interest survey asking whether organizations would consider enabling Copilot for Exchange Server (on‑premises) — even if that requires sending some...

Microsoft's outreach to Exchange Server administrators — a short, targeted survey asking whether organizations would want Copilot integrated into on‑premises Exchange — is a clear signal that the company is actively exploring ways to bring its AI assistant into environments that have, until now...

Microsoft’s Exchange Team has opened a direct line to on‑premises administrators with an interest survey for Copilot for Exchange Server (on‑premises) — a clear signal that Microsoft is actively exploring ways to bring Copilot‑style AI into environments that do not fully live in Microsoft 365...

Microsoft has assigned CVE-2025-59248 to a newly disclosed spoofing vulnerability in Microsoft Exchange Server, and the vendor released security updates on October 14, 2025 that address the issue in supported Exchange builds; the flaw is described as an improper input validation problem that can...

Microsoft has published a security update addressing CVE-2025-59249, an Elevation of Privilege (EoP) vulnerability in Microsoft Exchange Server that vendors and trackers classify as high‑severity (CVSS v3.1 base score 8.8) and that Microsoft delivered fixes for as part of the October 14, 2025...

Quick clarification before I write the full 2,000+ word article: I couldn't find any public advisory or reliable references for CVE-2025-53782. The MSRC/Exchange incident most commonly referenced in mid‑/late‑2025 is CVE-2025-53786 (a hybrid Exchange → Entra ID elevation-of-privilege issue)...

Microsoft today published October 2025 Security Updates for Exchange Server — a targeted release that patches multiple vulnerabilities, finalizes the last publicly available security rollups for Exchange Server 2016 and 2019, and introduces an operational change that blocks exporting the...

Microsoft has stopped issuing support, security fixes, bug patches and time‑zone updates for Exchange Server 2016 and Exchange Server 2019 as of October 14, 2025, and organizations that continue to run these on‑premises versions now face a materially higher security, compliance, and operational...

Microsoft and Exchange teams are warning administrators about a narrow—but potentially high‑impact—Active Directory schema replication problem that can surface when an Exchange cumulative update (for example, Exchange 2019 CU15 or Exchange Server Subscription Edition RTM) extends the schema...

On October 14, 2025, support for Exchange Server 2016 and Exchange Server 2019 ends — one month from now — and organizations that delay face escalating operational risk, loss of security updates, and an increasingly narrow set of safe upgrade paths. Microsoft’s Exchange engineering team has...

Microsoft’s Exchange team published a short but important Hotfix Update (HU) rollup for September 2025 that is aimed at fixing a non‑security issue in earlier updates and, crucially, preserves support for the dedicated Exchange hybrid application workflow introduced earlier in 2025 — the update...