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 Necessary-severity elevation of privilege situation touching the Home windows Widespread Log File system driver, is thought to be below 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 embody data on these in a desk under.  

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

We’re as all the time 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 masking the advisory-style updates; and a breakout of the patches affecting the varied Home windows Server platforms nonetheless in assist.  

By the numbers 

• Complete CVEs: 135
• Publicly disclosed: 0
• Exploit detected: 1
• Severity
  • Essential: 10
  • Necessary: 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
  • Info 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 better: 0
• CVSS base rating 8.0 or better: 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 notice that 9 of the Edge updates lined on this situation will not be launched with full affect data and comply with a unique 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 listing, CVEs that apply to a couple of 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 all the time mirror affected product households carefully. In explicit, some CVEs names within the Workplace household could point out merchandise that don’t seem within the listing 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 will not be launched with full affect data and comply with a unique 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 watch 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) embody the Preview Pane as a vector, elevating 4 of them from Necessary to Essential severity.  

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

An Necessary-severity elevation of privilege situation, this one seems to hinge on the attacker’s skill to compromise a trusted CA (Certificates Authority). If the attacker can accomplish that after which situation a certificates with a selected 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 beneficial mitigations, together with updating of all Home windows machines and area controllers to the patch launched at this time, monitoring audit occasions to identify any machine or gadget 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 in fact a longstanding downside within the ecosystem; with this CVE marked by Microsoft as extra prone to be exploited throughout the subsequent 30 days, it’s value prioritizing in your property. 

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

An Necessary-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 prospects 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 approved 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 most recent model of their System Heart product (.ZIP). 

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

One other situation doubtlessly requiring further care from directors, this Necessary-severity safety characteristic 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 most recent adjustments. If you happen to deployed this coverage, then you definately’ll must redeploy utilizing the up to date coverage.” 

Additionally, for any readers who missed the announcement, opposite to earlier plans Microsoft just isn’t deprecating driver replace synchronization through WSUS (Home windows Server Replace Companies) simply but. These nonetheless counting on the service to try this work (significantly for “disconnected” units) 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 

As you possibly can each month, should you don’t wish to wait on your system to drag down Microsoft’s updates itself, you possibly can obtain them manually from the Home windows Replace Catalog web site. Run the winver.exe device to find out which construct of Home windows 10 or 11 you’re operating, then obtain the Cumulative Replace bundle on your particular system’s structure and construct quantity. 

Appendix A: Vulnerability Influence and Severity 

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

Elevation of Privilege (48 CVEs) 

Distant Code Execution (33 CVEs) 

Info 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 listing of the April CVEs judged by Microsoft to be both below exploitation within the wild or extra prone to be exploited within the wild throughout the first 30 days post-release. The listing is additional organized by CVE.  

This can be a listing 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 listing of April’s patches sorted by product household, then sub-sorted by severity. Every listing 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 via 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 purple; 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 assist, will range. For particular Information Base numbers, please seek the advice of Microsoft. Please notice that CVE-2025-27475 is a client-only Home windows situation and thus seems on this chart, however with no server variations marked.