CVE-2026-20803
HighCVSS 7.2Exploitation Probability (EPSS)
Elevated risk66th percentile - higher than 66% of all known CVEs
Summary
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Risk Assessment
An attacker with network access can gain unauthorized access to sensitive data or take control of the database server.
Recommendation
Install the latest SQL Server security updates from Microsoft.
Other vulnerabilities in SQL Server
See all- CVE-2026-54118Critical
A vulnerability in SQL Server allows an unauthorized attacker to execute code over a network through deserialization of untrusted data.
- CVE-2026-54117Critical
A vulnerability in SQL Server allows an unauthorized attacker to execute code over a network through deserialization of untrusted data.
- CVE-2026-54116Medium
Access of resource using incompatible type ('type confusion') in SQL Server allows an authenticated attacker to disclose information over a network.
- CVE-2026-50468Medium
A buffer over-read in SQL Server allows an authorized attacker to disclose information over a network.
- CVE-2026-47295High
An SQL injection vulnerability in SQL Server. Improper neutralization of special elements used in an SQL command allows an authorized attacker to elevate privileges over a network.
- CVE-2026-55002High
A vulnerability in SQL Server allows an authorized attacker to elevate privileges over a network via external control of file name or path.
- CVE-2026-47296High
A vulnerability in SQL Server due to improper neutralization of special elements in SQL commands (SQL injection) allows an authorized attacker to elevate privileges over a network.
- CVE-2026-40370High
External control of file name or path in SQL Server allows an authorized attacker to execute code over a network.
- CVE-2026-33120High
An untrusted pointer dereference vulnerability in SQL Server allows an authorized attacker to execute code over a network.
- CVE-2026-21262High
A vulnerability in SQL Server allows an authorized attacker to elevate privileges over a network due to improper access control.
Original NVD description (English source)
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.