Microsoft confirms two major Defender security issues — so update now or face possible attack
Microsoft has confirmed two significant security vulnerabilities in its Defender antivirus tool that are currently being exploited. The vulnerabilities, tracked as CVE-2026-41091 and CVE-2026-45498, have been assigned high severity scores and require immediate attention. Users are advised to verify their software versions and ensure they are updated to avoid potential attacks.
- ▪Microsoft has patched two zero-day vulnerabilities in its Defender antivirus tool.
- ▪CISA has confirmed that these vulnerabilities are being actively exploited in the wild.
- ▪Federal agencies have until June 3 to patch or discontinue the vulnerable software.
TechRadar publishes from United Kingdom and files mainly under tech. We currently carry 1,403 of its stories.
Story provenance
Source · retrieval · rights · ranking — open for full record
inspect →
Story provenance
Attribution is not the same as permission. This drawer separates discovery metadata, excerpts, WeSearch-generated summaries, reuse status, and whether the publisher receives the visit. Nothing here claims a legal grant the publisher has not made.
Record
| Original publisher | TechRadar |
| Canonical URL | https://www.techradar.com/pro/security/microsoft-confirms-two-major-defender-security-issues-so-update-now-or-face-possible-attack |
| Publication time | Fri, 22 May 2026 17:05:00 +0000 |
| Retrieval time | 2026-05-22T17:12:02.720Z |
| Last seen | 2026-05-22T17:12:02.720Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | 2pjQzh5Qci64 |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
Rights status (four layers)
WeSearch handling by dimension
| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Pro Security Microsoft confirms two major Defender security issues — so update now or face possible attack News By Sead Fadilpašić published 22 May 2026 CISA confirms two bugs being actively exploited in the wild When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Microsoft) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Microsoft patches two actively exploited zero‑day flaws in Defender, tracked as CVE‑2026‑41091 (privilege escalation) and CVE‑2026‑45498 (denial of service)Updates were shipped automatically via Malware Protection Engine 1.1.26040.8 and Antimalware…
Excerpt limited to ~120 words for fair-use compliance. The full article is at TechRadar.
Discussion
0 commentsMore from TechRadar
