All news with #outage tag

Racks, Sprawl and the Myth of Redundancy in Modern Networks

🔁 The article traces redundancy from tangible rack-level practices to fragile cloud and software-defined environments. It argues that physical diversity, disciplined configuration management and automation remain essential as networks span BGP, SD-WAN, edge devices and cloud control planes. Real resilience requires policy alignment, diverse DNS and routing protections and rehearsed pre-mortems so backups are usable when they matter most.

Microsoft Investigates Copilot Outage Affecting Europe

⚠️Microsoft is mitigating an incident that has blocked or degraded access to its AI-powered Copilot service for users in the United Kingdom and parts of Europe. The company says telemetry points to an unexpected traffic surge that prevented service autoscaling, and engineers are manually scaling capacity to restore availability. A related admin-facing issue is also affecting some Microsoft Defender for Endpoint features.

Cloudflare Outage Caused by Emergency React2Shell Patch

🔧 Cloudflare says an emergency patch to mitigate the critical React2Shell vulnerability (CVE-2025-55182) introduced a change to its Web Application Firewall request parsing that briefly rendered the network unavailable and caused global "500 Internal Server Error" responses. The update targeted active remote code execution attempts against React Server Components and dependent frameworks. Cloudflare emphasized the incident was not an attack and that the change was deployed to protect customers while the industry addresses the flaw.

Cloudflare outage after WAF update to block React exploit

🛡️ Cloudflare briefly disrupted service after a Web Application Firewall update intended to mitigate a vulnerability in React Server Components (CVE-2025-55182) caused its request parser to fail. The incident began at 09:09 UTC and a corrective change was deployed within ten minutes, but monitoring sites and customers reported widespread errors during the outage. Downdetector logged spikes for enterprise and consumer services including Shopify, Zoom, Claude AI, and AWS. Cloudflare said the change was a protective measure for unpatched customers and confirmed the disruption was not an attack.

Cloudflare outage causes websites to return 500 errors

🚨 Cloudflare is experiencing an outage that is causing many websites to return an 500 Internal Server Error. The fault appears to be server-side and affects requests routed through Cloudflare, so users see an error page instead of normal content. Engineers at the provider are investigating the root cause and working to restore normal operations. This remains a developing situation and impacted sites may be unavailable until services are recovered.

Cloudflare outage on Dec 5, 2025 caused by WAF change

⚠️ On December 5, 2025 a configuration change to Cloudflare’s Web Application Firewall (WAF) triggered an error in a subset of proxies, causing HTTP 500 responses for affected customers. The change — increasing WAF request-body buffering to mitigate CVE-2025-55182 — was rolled out gradually, but a separate global configuration update disabled an internal tool and propagated immediately. That global change caused a Lua runtime nil lookup in the older FL1 proxy when a killswitch skipped an execute action in a ruleset; the change was reverted within 25 minutes and the incident was not caused by malicious activity.

Microsoft bug in Microsoft 365 licensing blocks downloads

⚠️ Microsoft is investigating a known issue that prevents customers from downloading Microsoft 365 desktop apps from the Microsoft 365 homepage, with failures reported since November 2. The company says a recent service update introduced a code defect affecting the license check process, and it has tagged the situation as an incident. A fix has been developed and is being validated in Microsoft's internal environment, and the company promised an update on deployment timing by 6:30 PM UTC. Microsoft is also addressing a separate issue causing some users to be unable to open Excel attachments in the new Outlook client due to filename encoding errors.

ChatGPT Experiences Worldwide Outage; Conversations Lost

⚠️OpenAI's ChatGPT experienced a global outage that caused errors and disappearing conversations for many users. Many reported seeing messages such as "something seems to have gone wrong" and "There was an error generating a response," while some conversations vanished and new messages kept loading indefinitely. DownDetector recorded over 30,000 reports, and OpenAI acknowledged elevated errors and said engineers were working on a fix. Service began returning as of 15:14 ET, though performance remained slow.

ChatGPT Outage Causes Global Errors and Missing Chats

🔴 OpenAI's ChatGPT experienced a global outage that produced "something seems to have gone wrong" errors and stalled responses, with some users reporting that entire conversations disappeared and new messages never finished loading. BleepingComputer observed the model continuously loading without delivering replies, while DownDetector recorded over 30,000 reports. OpenAI confirmed elevated errors at 02:40 ET, said it was working on a fix, and by 15:14 ET service had begun returning but remained slow.

Microsoft Defender portal outage disrupts XDR access

⚠️ Microsoft is mitigating an ongoing incident affecting the Defender XDR portal that began roughly 10 hours ago and was first acknowledged at 06:10 UTC. The outage stemmed from a traffic spike that drove high CPU utilization on components responsible for portal functions, blocking access and disrupting features such as advanced threat-hunting alerts and device visibility. Microsoft applied mitigation to increase processing throughput and reports partial recovery for some customers while it analyzes HAR traces and coordinates client-side diagnostics with impacted organizations.

Amazon Route 53 Accelerated Recovery for Public DNS

⚡ Enabling the accelerated recovery option for Amazon Route 53 public hosted zones gives customers a predictable 60-minute recovery time objective (RTO) to regain the ability to modify public DNS records if AWS services in US East (N. Virginia) are temporarily unavailable. The feature is available globally except in GovCloud and China, and there is no additional charge. It supports faster DNS change operations for banking, FinTech, and SaaS customers to meet continuity and disaster recovery objectives.

Exchange Online outage prevents classic Outlook access

⚠️ Microsoft is investigating an Exchange Online outage (incident EX1189820) preventing customers from accessing mailboxes via the classic Outlook desktop client, with reports of server connection and login failures. The company says impact is specific to users in Asia Pacific and North America and has classified the event as an incident in the admin center. As a workaround, affected users are advised to use Outlook on the Web while Microsoft analyzes the issue.

Cloudflare Outage Highlights Risks of Single-Vendor Reliance

🔍 An intermittent outage at Cloudflare on Nov. 18 briefly disrupted many major websites and forced some customers to pivot DNS and routing to preserve availability. Those provisional workarounds may have exposed origin infrastructure by bypassing edge protections such as WAFs and bot management. Security teams should review OWASP-related logs, emergency DNS changes, and any ad hoc services or devices introduced during the outage. The incident underscores single-vendor risk and the need for formal fallback plans.

Cloudflare Outage Caused by Database Permission Change

⚠️ Cloudflare suffered its worst outage in six years after a database permissions change caused its Bot Management system to generate an oversized configuration feature file containing duplicate entries. The file exceeded a hardcoded 200-feature limit, triggering a Rust panic that crashed core proxy software and produced widespread 5xx errors. Engineers restored service by replacing the problematic file, and full recovery was achieved several hours later.

Cloudflare outage disrupts global network services

⚠️ Cloudflare is investigating an outage that has produced widespread 500 internal server errors and impacted its Dashboard and API, disrupting access to numerous customer websites and platforms. The company first reported support portal availability issues and then an incident at 11:48 UTC affecting the Cloudflare Global Network, with multiple European nodes observed offline. Downdetector logged tens of thousands of reports, and Cloudflare says it is working to mitigate the incident; partial recovery has been reported for Access and WARP while remediation continues for application services.

Cloudflare outage (18 Nov 2025): feature file duplication

⚠️ On 18 November 2025, Cloudflare experienced a major outage after a permissions change in a ClickHouse database caused duplicated metadata to be emitted into a Bot Management feature file, doubling its size. The oversized file exceeded a preallocated feature limit in the core proxy, triggering a Rust panic and widespread HTTP 5xx errors. Cloudflare halted propagation, restored a known-good file, and restarted the proxy; services were largely restored by 14:30 UTC and fully recovered by 17:06 UTC. The company apologized and pledged architectural and process hardening to prevent recurrence.

Windows bug prevents Microsoft 365 desktop app installs

⚠️ Microsoft is addressing a known issue that prevents users from installing Microsoft 365 desktop apps on Windows devices. The problem stems from misconfigured authentication components affecting versions 2508 (Build 19127.20358) and 2507 (Build 19029.20294). The team is reconfiguring the components and expects a full remediation later today. Microsoft tagged the outage as incident OP1186186 and is also investigating a related admin access issue tracked as MO1176905.

Cyberattack Halts Dutch Broadcaster, Forces Vinyl Use

🎧 RTV Noord, a regional Dutch TV and radio broadcaster, reported a cyber incident on November 6, 2025, that blocked staff access to critical systems. Presenters on the "De Ochtendploeg" breakfast show resorted to playing CDs and LPs to stay on air. The attackers left a message on the network, prompting suspicion of ransomware, and the newsroom confirmed internal channels were limited to WhatsApp while services were restored.

Microsoft DNS Outage Disrupts Azure and Microsoft 365

⚠️ Microsoft is experiencing a global DNS outage that began about an hour ago, causing widespread access problems to Azure and Microsoft 365 services. Customers worldwide report they cannot log into corporate networks or reach portals including Azure, Intune, and the Exchange admin center, and some report the Azure Front Door CDN is also unavailable. Microsoft attributes the interruptions to DNS failures, warns of intermittent request failures and latency, and is reviewing telemetry while working on mitigation; it recommends programmatic access (PowerShell/CLI) when portals are unreachable.

Q3 2025 Internet Disruptions: Causes and Observations

🌐 In Q3 2025 Cloudflare observed a wide range of Internet disruptions affecting governments, carriers, and infrastructure worldwide. Incidents included government-directed shutdowns in Sudan, Syria, Iraq, Venezuela, and Afghanistan; submarine and terrestrial cable cuts; power outages; a major earthquake; a targeted cyberattack; and technical failures such as Great Firewall anomalies and Starlink outages. The post synthesizes observed traffic losses using Cloudflare Radar metrics.