CVE-2026-35199 SymCrypt SymCryptXmssSign function - Heap overflow via 64->32-bit leaf-count truncation

SymCrypt is the core cryptographic function library currently used by Windows. From 103.5.0 to before 103.11.0, The SymCryptXmssSign function passes a 64-bit leaf count value to a helper function that accepts a 32-bit parameter. For XMSS^MT parameter sets with total tree height = 32 which include...

SymCrypt Windows DoS

The vulnerability of the SymCrypt library in the Windows operating system is related to an uncontrolled consumption of resources. Exploiting this vulnerability can allow a remote attacker to cause service interruptions...

CVE-2021-43228

SymCrypt Denial of Service Vulnerability...

SymCrypt Disclosure

The vulnerability of the SymCrypt library in the Windows operating system is related to errors in cryptographic transformations. Exploiting this vulnerability can allow an attacker to disclose protected information during the OAEP decryption process...

SymCrypt Digital Signature DoS

The vulnerability of the SymCrypt library in the Windows operating system is related to errors in digitized signatures. Exploiting this vulnerability allows a remote attacker to cause service interruptions...

Microsoft Releases July 2019 Security Updates, 2 Flaws Under Active Attack

Microsoft today released its monthly batch of software security updates for the July month to patch a total of 77 vulnerabilities, 14 are rated Critical, 62 are Important, and 1 is rated Moderate in severity. The July 2019 security updates include patches for various supported versions of Windows...