Out-of-band Exchange Server update fixes high-severity mailbox access bug (CVE-2026-96940) 2026-10-05 at 13:38 By Zeljka Zorz Microsoft has pushed out an out-of-band security update for Exchange Server that fixes a high-severity vulnerability (CVE-2026-96940) that may allow authenticated attackers to read emails and attachments of other users in the same organization, but “does not allow access […]
September 2026 Patch Tuesday: Record patch count, 2 zero-days, and a SigRed successor 2026-09-09 at 12:04 By Zeljka Zorz September 2026 Patch Tuesday is here, with Microsoft delivering another record-breaking number of patches, including those for two vulnerabilities that have been exploited as zero-days. Another “new normal” is the anonymous security researcher Nightmare Eclipse publishing […]
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Nearly 22,000 Microsoft Exchange servers remain exposed to critical security flaw (CVE-2026-62911) 2026-09-02 at 16:24 By Sinisa Markovic Nearly 22,000 Microsoft Exchange servers remain unpatched against CVE-2026-62911, a critical authentication bypass vulnerability, according to daily scans from the Shadowserver Foundation. The United States and Germany top the list with 6,200 and 5,100 unpatched servers. CVE-2026-62911 […]
Laundry Bear’s new Microsoft Exchange attack triggers on email open (CVE-2026-42897) 2026-07-30 at 17:23 By Zeljka Zorz Russia-affiliated cyber espionage group Laundry Bear (aka Void Blizzard, aka TA488) is exploiting CVE-2026-42897, a cross-site scripting vulnerability in Microsoft Exchange, to target US and European government entities and a variety of private sector organizations via email. The […]
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Microsoft Warns of Exchange Server Zero-Day Exploited in the Wild 2026-05-15 at 15:32 By Eduard Kovacs Microsoft has shared mitigations for CVE-2026-42897 until a permanent patch can be released for affected Exchange Server versions. The post Microsoft Warns of Exchange Server Zero-Day Exploited in the Wild appeared first on SecurityWeek. This article is an excerpt […]
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Unpatched Microsoft Exchange Server vulnerability exploited (CVE-2026-42897) 2026-05-15 at 14:32 By Zeljka Zorz A critical cross-site scripting (XSS) vulnerability (CVE-2026-42897) in Microsoft Exchange Server is being exploited by attackers, Microsoft warned on Thursday. A permanent fix is still in the works. In the meantime, Microsoft provided temporary mitigations. About CVE-2026-42897 CVE-2026-42897 affects on-premises versions of […]
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Microsoft adds high-volume email sending to Exchange Online 2026-04-02 at 07:58 By Anamarija Pogorelec Organizations that rely on Exchange Online for internal communications have long needed a way to send large volumes of automated messages, such as payroll notifications, IT alerts, and security advisories, without running into the sending limits designed for person-to-person email. Microsoft […]
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CISA and partners take action as Microsoft Exchange security risks mount 2025-10-31 at 19:32 By Zeljka Zorz In partnership with international cybersecurity agencies, the US Cybersecurity and Infrastructure Security Agency (CISA) and the National Security Agency (NSA) outlined security best practices for organizations that use on-premises versions of Microsoft Exchange Server. Microsoft Exchange servers are […]
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Microsoft patches three zero-days actively exploited by attackers 2025-10-15 at 13:18 By Zeljka Zorz On October 2025 Patch Tuesday, Microsoft released fixes for 175+ vulnerabilities, including three zero-days under active attack: CVE-2025-24990, CVE-2025-59230, and CVE-2025-47827. The actively exploited vulnerabilities are an unusual mix CVE-2025-24990 is in the third-party driver (ltmdm64.sys) for the software-based Agere Modem, […]
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Microsoft urges admins to plug severe Exchange security hole (CVE-2025-53786) 2025-08-07 at 17:40 By Zeljka Zorz “In an Exchange hybrid deployment, an attacker who first gains administrative access to an on-premises Exchange server could potentially escalate privileges within the organization’s connected cloud environment without leaving easily detectable and auditable trace,” Microsoft has announced on Wednesday. […]
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Organizations Warned of Vulnerability in Microsoft Exchange Hybrid Deployment 2025-08-07 at 14:23 By Eduard Kovacs CISA and Microsoft have issued advisories for CVE-2025-53786, a high-severity flaw allowing privilege escalation in cloud environments. The post Organizations Warned of Vulnerability in Microsoft Exchange Hybrid Deployment appeared first on SecurityWeek. This article is an excerpt from SecurityWeek View […]
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Researchers unearth keyloggers on Outlook login pages 2025-06-17 at 18:37 By Zeljka Zorz Unknown threat actors have compromised internet-accessible Microsoft Exchange Servers of government organizations and companies around the world, and have injected the organizations’ Outlook on the Web (OWA) login page with browser-based keyloggers, Positive Technologies researchers have warned. The keylogging JavaScript code (Source: […]
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Microsoft enforces defenses preventing NTLM relay attacks 2024-12-11 at 15:03 By Zeljka Zorz Since making Kerberos the default Windows authentication protocol in 2000, Microsoft has been working on eventually retiring NTLM, its less secure and obsolete counterpart. Until NTLM gets disabled by default, Microsoft is working on shoring up defenses against NTLM relay attacks. How […]
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17,000+ Microsoft Exchange servers in Germany are vulnerable to attack, BSI warns 2024-03-26 at 15:31 By Zeljka Zorz Around 12% of the 45,000 or so Microsoft Exchange servers in Germany that can be accessed from the Internet without restrictions “are so outdated that security updates are no longer offered for them,” the German Federal Office […]
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March 2024 Patch Tuesday: Microsoft fixes critical bugs in Windows Hyper-V 2024-03-12 at 22:11 By Zeljka Zorz On this March 2024 Patch Tuesday, Microsoft has released fixes for 59 CVE-numbered vulnerabilities, but – welcome news! – none of them are currently publicly known or actively exploited. Last month, though, several days after Patch Tuesday, the […]
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Microsoft patches two zero-days exploited by attackers (CVE-2024-21412, CVE-2024-21351) 2024-02-13 at 22:01 By Zeljka Zorz On February 2024 Patch Tuesday, Microsoft has delivered fixes for 72 CVE-numbered vulnerabilities, including two zero-days (CVE-2024-21412, CVE-2024-21351) that are being leveraged by attackers in the wild. About CVE-2024-21412 and CVE-2024-21351 CVE-2024-21412 allows attackers to bypass the Microsoft Defender SmartScreen […]
Microsoft patches two zero-days exploited by attackers (CVE-2024-21412, CVE-2024-21351) Read More »
Russian hackers use old Outlook vulnerability to target Polish orgs (CVE-2023-23397) 05/12/2023 at 17:47 By Helga Labus Russian state-backed hacking group Forest Blizzard (aka Fancy Bear, aka APT28) has been using a known Microsoft Outlook vulnerability (CVE-2023-23397) to target public and private entities in Poland, Polish Cyber Command has warned. Compromising email accounts and maintaining […]
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Microsoft plugs exploited WordPad, Skype for Business zero-days (CVE-2023-36563, CVE-2023-41763) 10/10/2023 at 22:01 By Zeljka Zorz On this October 2023 Patch Tuesday, Microsoft has released 103 patches and has fixed three actively exploited vulnerabilities (CVE-2023-36563, CVE-2023-41763, CVE-2023-44487). The exploited zero-days (CVE-2023-36563, CVE-2023-41763, CVE-2023-44487) CVE-2023-36563, discovered by Microsoft Threat Intelligence, is a WordPad vulnerability that could […]
Microsoft, Adobe fix zero-days exploited by attackers (CVE-2023-26369, CVE-2023-36761, CVE-2023-36802) 12/09/2023 at 22:01 By Zeljka Zorz September 2023 Patch Tuesday is here, with fixes for actively exploited vulnerabilities in Adobe Acrobat and Reader (CVE-2023-26369), Microsoft Word (CVE-2023-36761), and Microsoft Streaming Service Proxy (CVE-2023-36802). Microsoft vulnerabilities of note Microsoft has delivered fixes for 61 CVE-numbered flaws: […]
August 2023 Patch Tuesday: Microsoft fixes critical bugs in Teams, MSMQ 08/08/2023 at 22:46 By Zeljka Zorz August 2023 Patch Tuesday is here; among the 76 CVE-numbered issues fixed by Microsoft this time around is a DoS vulnerability in .NET and Visual Studio (CVE-2023-38180) for which proof-of-exploit code exists. Other than the fact that a […]
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