Industrial-strength April Patch Tuesday covers 135 CVEs – Sophos Information

Microsoft on Tuesday launched 135 patches affecting 19 product households. Ten of the addressed points, all distant code execution points, are thought-about by Microsoft to be of Essential severity, and 18 have a CVSS base rating of 8.0 or increased. One, an Essential-severity elevation of privilege situation touching the Home windows Frequent Log File system driver, is understood to be underneath lively exploit within the wild.  

At patch time, 11 further CVEs usually tend to be exploited within the subsequent 30 days by the corporate’s estimation. Varied of this month’s points are amenable to direct detection by Sophos protections, and we embrace data on these in a desk beneath.  

Along with these patches, sixteen Essential-severity Adobe Reader points affecting ColdFusion are lined within the launch. These are listed in Appendix D beneath. In a departure from regular process, we’re together with all Edge CVEs in our numbers this month the place doable, although these patches had been for essentially the most half made accessible individually from at the moment’s launch. 

We’re as at all times together with on the finish of this put up further appendices itemizing all Microsoft’s patches sorted by severity, by predicted exploitability timeline and CVSS Base rating, and by product household; an appendix protecting the advisory-style updates; and a breakout of the patches affecting the assorted Home windows Server platforms nonetheless in help.  

By the numbers 

• Whole CVEs: 135
• Publicly disclosed: 0
• Exploit detected: 1
• Severity
  • Essential: 10
  • Essential: 114
  • Low: 2
  • Excessive / Medium / Low: 9 (Edge-related CVEs issued by Chromium; see Appendix C)
• Impression
  • Elevation of Privilege: 48
  • Distant Code Execution: 33
  • Data Disclosure: 18
  • Denial of Service: 14
  • Safety Function Bypass: 9
  • Spoofing: 4
  • Unknown: 9 (Edge-related CVEs issued by Chromium; see Appendix C)
• CVSS rating 9.0 or higher: 0
• CVSS base rating 8.0 or higher: 18

Determine 1: Elevation of privilege accounts for over a 3rd of all April patches, however all of the Essential-severity objects are distant code execution. (Please be aware that 9 of the Edge updates lined on this situation aren’t launched with full affect data and observe a special severity schema, and thus don’t seem on this chart; please see Appendix C) 

Merchandise 

• Home windows: 89
• 365: 15
• Workplace: 15
• Edge: 13
• SharePoint: 6
• Visible Studio: 5
• Azure: 4
• Excel: 3
• Microsoft AutoUpdate (MAU) for Mac: 2
• Phrase: 2
• Entry: 1
• ASP.NET: 1
• Dynamics 365: 1
• OneNote: 1
• Outlook for Android: 1
• Energy Automate for Desktop: 1
• SQL Server: 1
• System Heart: 1
• Visible Studio Instruments for Purposes (VSTA): 1

As is our customized for this record, CVEs that apply to a couple of product household are counted as soon as for every household they have an effect on. It ought to be famous that CVE names in April don’t at all times replicate affected product households intently. In specific, some CVEs names within the Workplace household might point out merchandise that don’t seem within the record of merchandise affected by the CVE, and vice versa.

Determine 2: Nineteen product households are affected by April’s patches; as famous above, 9 of the Edge updates lined on this situation aren’t launched with full affect data and observe a special severity schema, and thus seem right here as “unknown” in affect; please see Appendix C 

Notable April updates 

Along with the problems mentioned above, quite a lot of particular objects advantage consideration.  

CVE-2025-26642, CVE-2025-27745, CVE-2025-27747, CVE-2025-27748, CVE-2025-27749, CVE-2025-27750, CVE-2025-27751, CVE-2025-2772, CVE-2025-29791, CVE-2025-29816, CVE-2025-29820, CVE-2025-29822 (12 CVEs) – assorted Workplace points 

Workplace takes a heavy patch load this month, and the information is especially not good for customers of Workplace LTSC for Mac 2021 and 2024. All twelve CVEs listed above are relevant to these variations, however the replace isn’t prepared but; affected events are suggested to observe these CVEs for replace availability. Worse, 5 of the twelve (CVE-2025-27745, CVE-2025-27748, CVE-2025-27749, CVE-2025-27752, CVE-2025-29791) embrace the Preview Pane as a vector, elevating 4 of them from Essential to Essential severity.  

CVE-2025-26647 — Home windows Kerberos Elevation of Privilege Vulnerability 

An Essential-severity elevation of privilege situation, this one seems to hinge on the attacker’s potential to compromise a trusted CA (Certificates Authority). If the attacker can achieve this after which situation a certificates with a particular Topic Key Identifier (SKI) worth, they might then use that certificates to hook up with the system, in the end assuming the identification of any account. This one comes with advisable mitigations, together with updating of all Home windows machines and area controllers to the patch launched at the moment, monitoring audit occasions to identify any machine or machine that escapes that replace, and enabling Enforcement Mode as soon as your setting not makes use of certificates issued by authorities not within the NTAuth retailer. CA compromise is after all a longstanding drawback within the ecosystem; with this CVE marked by Microsoft as extra prone to be exploited inside the subsequent 30 days, it’s price prioritizing in your property. 

CVE-2025-27743 — Microsoft System Heart Elevation of Privilege Vulnerability 

An Essential-severity elevation-of-privilege situation, this CVE touches a constellation of System Heart merchandise (Operations Supervisor, Service Supervisor, Orchestrator, Knowledge Safety Supervisor, Digital Machine Supervisor) and impacts clients who re-use present System Heart .exe installer recordsdata to deploy new situations of their environments. The issue stems from an untrusted search path in System Heart, which an attacker might, with approved entry and a few facility with DLL hijacking, use to raise their privileges. Microsoft advises affected customers to delete their present installer setup recordsdata (.exe) after which obtain the newest model of their System Heart product (.ZIP). 

CVE-2025-29809 — Home windows Kerberos Safety Function Bypass Vulnerability 

One other situation probably requiring additional care from directors, this Essential-severity safety function bypass requires rollback of a earlier coverage. To cite Microsoft’s steering, “The coverage described in Steerage for blocking rollback of Virtualization-based Safety (VBS) associated safety updates has been up to date to account for the newest modifications. When you deployed this coverage, then you definately’ll have to redeploy utilizing the up to date coverage.” 

CVE-2025-29824 — Home windows Frequent Log File System Driver Elevation of Privilege Vulnerability 

That is the only real CVE amongst this month’s Patch Tuesday assortment that’s recognized to be underneath lively exploit within the wild. Sophos customers are already protected, as we launched Troj/PipeMag-A towards samples we captured previous to this month’s launch.

Additionally, for any readers who missed the announcement, opposite to earlier plans Microsoft will not be deprecating driver replace synchronization through WSUS (Home windows Server Replace Companies) simply but. These nonetheless counting on the service to do this work (significantly for “disconnected” gadgets) have a reprieve for now, however ought to proceed planning to maneuver to the cloud-based companies Microsoft now prioritizes. 

Determine 3: As distant code execution did final month, elevation of privilege points handed the 100-CVE mark with this month’s Patch Tuesday launch 

Sophos protections 

Please see the “Notable April updates” part above for data on CVE-2025-29824.

As you may each month, in the event you don’t wish to wait to your system to drag down Microsoft’s updates itself, you may obtain them manually from the Home windows Replace Catalog web site. Run the winver.exe instrument to find out which construct of Home windows 10 or 11 you’re working, then obtain the Cumulative Replace package deal to your particular system’s structure and construct quantity. 

Appendix A: Vulnerability Impression and Severity 

This can be a record of April patches sorted by affect, then sub-sorted by severity. Every record is additional organized by CVE.  

Elevation of Privilege (48 CVEs) 

Distant Code Execution (33 CVEs) 

Data Disclosure (18 CVEs) 

Denial of Service (14 CVEs) 

Safety Function Bypass (9 CVEs) 

Spoofing (4 CVE) 

Appendix B: Exploitability and CVSS 

This can be a record of the April CVEs judged by Microsoft to be both underneath exploitation within the wild or extra prone to be exploited within the wild inside the first 30 days post-release. The record is additional organized by CVE.  

This can be a record of April’s CVEs with a Microsoft-assessed CVSS Base rating of 8.0 or increased. They’re organized by rating and additional sorted by CVE. For extra data on how CVSS works, please see our collection on patch prioritization schema. 

Appendix C: Merchandise Affected 

This can be a record of April’s patches sorted by product household, then sub-sorted by severity. Every record is additional organized by CVE. Patches which are shared amongst a number of product households are listed a number of instances, as soon as for every product household. Points affecting Home windows Server are additional sorted in Appendix E.  

Home windows (89 CVEs) 

365 (15 CVEs) 

Workplace (15 CVEs) 

Edge (13 CVEs) 

SharePoint (6 CVEs) 

Visible Studio (5 CVEs) 

Azure (4 CVEs) 

Excel (3 CVEs) 

Microsoft AutoUpdater for Mac (2 CVEs) 

Phrase (2 CVEs) 

Entry (1 CVE) 

ASP.NET (1 CVE) 

Dynamics 365 (1 CVE) 

OneNote (1 CVE) 

Outlook for Android (1 CVE) 

Energy Automate Desktop (1 CVE) 

SQL Server (1 CVE) 

System Heart (1 CVE) 

VSTA (1 CVE) 

Appendix D: Advisories and Different Merchandise 

There are 16 Adobe advisories on this month’s launch. 

Appendix E: Affected Home windows Server variations 

This can be a desk of the CVEs within the April launch affecting 9 Home windows Server variations, 2008 by means of 2025. The desk differentiates amongst main variations of the platform however doesn’t go into deeper element (eg., Server Core). Essential-severity points are marked in crimson; an “x” signifies that the CVE doesn’t apply to that model. Directors are inspired to make use of this appendix as a place to begin to establish their particular publicity, as every reader’s state of affairs, particularly because it considerations merchandise out of mainstream help, will range. For particular Information Base numbers, please seek the advice of Microsoft. Please be aware that CVE-2025-27475 is a client-only Home windows situation and thus seems on this chart, however with no server variations marked.