Sep 2026: Microsoft SQL Server Remote Code Execution Vulnerability
CVE-2026-67636 Published on September 8, 2026
Microsoft SQL Server Remote Code Execution Vulnerability
Out-of-bounds read in SQL Server allows an authorized attacker to execute code over a network.
Weakness Type
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
Products Associated with CVE-2026-67636
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Affected Versions
Microsoft SQL Server 2019 (CU 32):- Version 15.0.0.0 and below 15.0.4490.9 is affected.
- Version 15.0.0 and below 15.0.2190.7 is affected.
- Version 16.0.0.0 and below 16.0.4275.2 is affected.
- Version 16.0.0 and below 16.0.1200.5 is affected.
- Version 17.0.0.0 and below 17.0.4085.5 is affected.
- Version 17.0.1050.2 and below 17.0.1135.8 is affected.