Vendor advisories

Microsoft Security Response Center

Browse 15,972 advisories from this official source. Search by product, CVE, severity, or advisory ID.

Current Checked 3 hours ago Checked every 6 hours

15,972 advisories

Each date says whether the vendor published or updated the bulletin. A vendor bulletin describes products that may be affected. It does not prove that the vulnerable product or version is installed in your environment.

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Microsoft Security Response CenterCVE-2026-63532
CriticalCVSS 7.8

Microsoft Office Remote Code Execution Vulnerability

Integer overflow or wraparound in Microsoft Office allows an unauthorized attacker to execute code locally.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versionshttps://aka.ms/OfficeSecurityReleases, 16.112.26081010, 16.0.5565.1001
Vendor guidance

Click to Run Release Notes Install KB5002897.

Microsoft Security Response CenterCVE-2026-55039
HighCVSS 7.8

Microsoft Excel Remote Code Execution Vulnerability

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected productsOffice Online Server, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.0.10417.20175, https://aka.ms/OfficeSecurityReleases, 16.111.26071215, 16.0.5561.1001
Vendor guidance

Click to Run Release Notes Install KB5002884. Install KB5002886.

Microsoft Security Response CenterCVE-2026-78526
HighCVSS 8.8

Microsoft Office Word Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002898.

Microsoft Security Response CenterCVE-2026-78517
HighCVSS 8.8

Microsoft Office Word Remote Code Execution Vulnerability

Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office 365 for Mac, Microsoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems
Fixed versions16.113.26091433, 16.0.10417.20207, 16.0.20326.20138, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002923.

Microsoft Security Response CenterCVE-2026-77901
HighCVSS 8.8

Microsoft Office Word Remote Code Execution Vulnerability

Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected productsMicrosoft Office 2019 for 32-bit editions, Microsoft Office 2019 for 64-bit editions, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems
Fixed versions16.0.10417.20207, 16.0.20326.20138, 16.113.26091433, 16.0.14334.20906
Vendor guidance

Release Notes Install KB5002923.

Microsoft Security Response CenterCVE-2026-62871
HighCVSS 7.8

.NET Elevation of Privilege Vulnerability

Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.

Affected products.NET 8.0 runtime installed on Windows, .NET 9.0 runtime installed on Windows, Microsoft Visual Studio 2026 version 18.8, Microsoft Visual Studio 2022 version 17.14
Fixed versions8.0.30, 9.0.19, 18.8.3, 17.14.38
Vendor guidance

Install KB5122104. Install KB5122105.

Microsoft Security Response CenterCVE-2025-40005
MediumCVSS 6.6

spi: cadence-quadspi: Implement refcount to handle unbind during busy

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the mos...

Affected productsazl3 kernel 6.6.112.1-2 on Azure Linux 3.0, azl3 kernel 6.6.119.3-3 on Azure Linux 3.0, azl3 kernel 6.6.121.1-1 on Azure Linux 3.0, cbl2 kernel 5.15.200.1-1 on CBL Mariner 2.0
Fixed versions6.6.126.1-1
Vendor guidance

CBL-Mariner Releases

Microsoft Security Response CenterCVE-2024-27056
MediumCVSS 5.5

wifi: iwlwifi: mvm: ensure offloading TID queue exists

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the mos...

Affected productscbl2 kernel 5.15.202.1-1 on CBL Mariner 2.0, cbl2 kernel 5.15.202.1-1, cbl2 kernel 5.15.202.1-1 on CBL-Mariner 2.0, cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0
Vendor guidance

See the Microsoft Security Update Guide for the update that applies to your product.

Microsoft Security Response CenterCVE-2026-86145
HighCVSS 8.2

PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Mariner

Affected productsazl3 pcre2 10.42-3 on Azure Linux 3.0
Fixed versions10.48-1
Vendor guidance

See the Microsoft Security Update Guide for the update that applies to your product.

Microsoft Security Response CenterCVE-2026-86143
MediumCVSS 6.9

In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.

Mariner

Affected productsazl3 libxml2 2.11.5-10 on Azure Linux 3.0
Fixed versions2.11.5-11
Vendor guidance

See the Microsoft Security Update Guide for the update that applies to your product.

Microsoft Security Response CenterCVE-2026-86144
MediumCVSS 5.6

In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).

Mariner

Affected productsazl3 libxml2 2.11.5-10 on Azure Linux 3.0
Fixed versions2.11.5-11
Vendor guidance

See the Microsoft Security Update Guide for the update that applies to your product.

Microsoft Security Response CenterCVE-2025-8224
MediumCVSS 5.5

GNU Binutils BFD Library elf.c bfd_elf_get_str_section null pointer dereference

Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability? One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the mos...

Affected productscbl2 binutils 2.37-15 on CBL Mariner 2.0
Before you act

Start with the vendor's bulletin.

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Confirm the installed product and version, read the linked vendor guidance, and test the recommended update or mitigation through your normal change process.

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