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 of by Microsoft to be of Essential severity, and 18 have a CVSS base rating of 8.0 or increased. One, an Vital-severity elevation of privilege subject touching the Home windows Widespread Log File system driver, is understood to be beneath energetic 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. Numerous 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 Vital-severity Adobe Reader points affecting ColdFusion are coated within the launch. These are listed in Appendix D beneath. In a departure from common process, we’re together with all Edge CVEs in our numbers this month the place potential, although these patches have been for probably the most half made obtainable individually from right this moment’s launch. 

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

By the numbers 

• Complete CVEs: 135
• Publicly disclosed: 0
• Exploit detected: 1
• Severity
  • Essential: 10
  • Vital: 114
  • Low: 2
  • Excessive / Medium / Low: 9 (Edge-related CVEs issued by Chromium; see Appendix C)
• Influence
  • Elevation of Privilege: 48
  • Distant Code Execution: 33
  • Data Disclosure: 18
  • Denial of Service: 14
  • Safety Characteristic Bypass: 9
  • Spoofing: 4
  • Unknown: 9 (Edge-related CVEs issued by Chromium; see Appendix C)
• CVSS rating 9.0 or larger: 0
• CVSS base rating 8.0 or larger: 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 observe that 9 of the Edge updates coated on this subject will not be launched with full affect data and comply with 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 Functions (VSTA): 1

As is our customized for this record, CVEs that apply to multiple product household are counted as soon as for every household they have an effect on. It must be famous that CVE names in April don’t at all times replicate affected product households intently. In explicit, 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 coated on this subject will not be launched with full affect data and comply with 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 Vital to Essential severity.  

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

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

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

An Vital-severity elevation-of-privilege subject, 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 current System Heart .exe installer recordsdata to deploy new cases of their environments. The issue stems from an untrusted search path in System Heart, which an attacker may, with licensed entry and a few facility with DLL hijacking, use to raise their privileges. Microsoft advises affected customers to delete their current installer setup recordsdata (.exe) after which obtain the newest model of their System Heart product (.ZIP). 

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

One other subject probably requiring further care from directors, this Vital-severity safety function bypass requires rollback of a earlier coverage. To cite Microsoft’s steerage, “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. In the event you deployed this coverage, then you definitely’ll must redeploy utilizing the up to date coverage.” 

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

As you’ll be able to each month, should you don’t wish to wait to your system to tug down Microsoft’s updates itself, you’ll be able to 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 Influence 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 Characteristic 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 beneath exploitation within the wild or extra more likely to be exploited within the wild throughout 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 sequence 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 can be shared amongst a number of product households are listed a number of occasions, 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 pink; 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 determine their particular publicity, as every reader’s state of affairs, particularly because it considerations merchandise out of mainstream help, will fluctuate. For particular Data Base numbers, please seek the advice of Microsoft. Please observe that CVE-2025-27475 is a client-only Home windows subject and thus seems on this chart, however with no server variations marked.