Patch Tuesday – September 2025


Microsoft is addressing 176 vulnerabilities today, which seems like a lot, and it is. Curiously, Microsoft’s own Security Update Guide (SUG) for September 2025 Patch Tuesday only lists 86 vulns, and that’s because the SUG doesn’t include a large number of open source software (OSS) fixes published today as part of updates for Azure Linux and CLB Mariner.

Microsoft is aware of public disclosure for just two of the vulnerabilities published today, and claims no evidence of in-the-wild exploitation. Yet again, there are zero-day vulnerabilities patched, but none of them evaluate as critical severity. Today’s release includes the publication of five critical remote code execution (RCE) vulnerabilities, although Microsoft expects that none of these are particularly likely to see exploitation. Five browser vulnerabilities have already been published separately this month, and are not included in the total.

Read more…
Source: Rapid7


Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox


Related:

  • Patch Tuesday

    May 13, 2026

    Microsoft is publishing 137 vulnerabilities on May 2026 Patch Tuesday. Microsoft is not aware of exploitation in the wild or public disclosure for any of these vulnerabilities. So far this month, Microsoft has provided patches to address 133 browser vulnerabilities, which are not included in the Patch Tuesday count above. Windows Netlogon: critical RCE Anyone responsible for securing ...

  • Update WhatsApp now: Two new flaws could expose you to malicious files

    May 5, 2026

    Meta has published a new security advisory for messaging app WhatsApp, announcing patches for two vulnerabilities. WhatsApp has fixed two security flaws that could be abused to interfere with how media and attachments are handled on your device. There is no evidence that either bug has been exploited in the wild. These bugs don’t automatically infect ...

  • Nasty cPanel vulnerability probably exploited as a 0-day

    April 30, 2026

    Emergency patches are available for a critical vulnerability in cPanel and WHM that allows attackers to bypass authentication and gain root access to servers managed using it. Given that cPanel and WebHost Manager (WHM) control panel help manage properties for 70 million domains, by some estimates, and the critical severity of CVE-2026-41940 (9.8), the vulnerability is ...

  • Apple fixes iOS bug that kept deleted notifications, including chat previews

    April 23, 2026

    Apple has released a software update that deals with an issue that could allow deleted notifications to be retrieved. Something that, in at least one reported case, was used by law enforcement during forensic analysis. Apple fixed the issue in iOS and iPadOS versions 18.7.8 and 26.4.2 (check availability for your device at those links). The ...

  • Microsoft releases Windows Server update fix to fix its April update fixes

    April 20, 2026

    Microsoft has pushed out an out-of-band update to address the restart loop that hit some Windows Server devices after its April update. The fix will spare administrators the headache of forced server restarts after installing the April 2026 update. (A reminder that deploying any Microsoft update directly to production without thorough testing is, to put it ...

  • Cisco tells Webex users to patch critical security flaws immediately

    April 17, 2026

    Cisco has pushed a new patch to address four critical-severity vulnerabilities plaguing its cloud-based Webex Services platform – and has also warned Wi-Fi access points users of a bug in certain versions of IOS XE that could result in a device bootloop. Webex Services is a platform for communication and collaboration, letting people hold video meetings, ...