{"id":9892,"date":"2026-01-15T10:04:14","date_gmt":"2026-01-15T10:04:14","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/01\/15\/microsoft-sql-server-vulnerability-allows-attackers-to-elevate-privileges-over-a-network\/"},"modified":"2026-01-15T10:04:14","modified_gmt":"2026-01-15T10:04:14","slug":"microsoft-sql-server-vulnerability-allows-attackers-to-elevate-privileges-over-a-network","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/01\/15\/microsoft-sql-server-vulnerability-allows-attackers-to-elevate-privileges-over-a-network\/","title":{"rendered":"Microsoft SQL Server Vulnerability Allows Attackers to Elevate Privileges over a Network"},"content":{"rendered":"

Microsoft SQL Server Vulnerability Allows Attackers to Elevate Privileges over a Network
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Microsoft released security updates on January 13, 2026, addressing a critical elevation of privilege vulnerability in SQL Server<\/a> that enables authorized attackers to bypass authentication controls and gain elevated system privileges remotely.<\/p>\n

Tracked as CVE-2026-20803, the vulnerability stems from missing authentication mechanisms for critical functions within the database<\/a> engine.<\/p>\n

The flaw affects multiple SQL Server versions, including SQL Server 2022 and the recently released SQL Server 2025. With a CVSS score of 7.2, Microsoft classified the vulnerability as \u201cImportant\u201d severity.<\/p>\n

The attack requires high privileges and network access, but once exploited, it grants attackers high-impact capabilities, including\u00a0memory dumping<\/a>\u00a0and debugging access, potentially opening gateways for further system compromise.<\/span><\/p>\n

\n\n\n\n\n\n
CVE ID<\/th>\nSeverity<\/th>\nCVSS Score<\/th>\nAttack Vector<\/th>\n<\/tr>\n<\/thead>\n
CVE-2026-20803<\/a><\/td>\nImportant<\/td>\n7.2<\/td>\nNetwork<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Vulnerability Details and Impact<\/strong><\/h2>\n

CVE-2026-20803 exploits CWE-306<\/a>, a weakness involving missing authentication for critical functions.<\/p>\n

The vulnerability allows authenticated users with elevated permissions to escalate their access beyond intended boundaries without user interaction.<\/p>\n

An attacker successfully exploiting this flaw could gain debugging<\/a> privileges, dump sensitive memory contents, and potentially access encrypted data or extract database credentials stored in memory.<\/p>\n

The vulnerability received a \u201cLess Likely\u201d exploitability assessment at publication, indicating it requires specific preconditions and is unlikely to be widely exploited in the immediate term.<\/p>\n

However, Microsoft has not disclosed reports of active exploitation or public disclosure attempts.<\/p>\n

Microsoft provided security updates across affected SQL Server versions through General Distribution Release (GDR<\/a>) and Cumulative Update (CU) pathways.<\/p>\n

Organizations running SQL Server 2022 should apply either CU22 (build 16.0.4230.2) or RTM GDR (build 16.0.1165.1) updates. SQL Server 2025 users must install the January GDR update (build 17.0.1050.2).<\/p>\n

Organizations should prioritize patching systems in internet-facing environments or those handling sensitive data.<\/p>\n

Microsoft recommends <\/a>reviewing deployment architectures and restricting administrative access to minimize exploitation risk during update windows.<\/p>\n

Follow us on Google News<\/a>, LinkedIn<\/a>, and X<\/a> for daily cybersecurity updates. Contact us<\/a> to feature your stories.<\/strong><\/p>\n

The post Microsoft SQL Server Vulnerability Allows Attackers to Elevate Privileges over a Network<\/a> appeared first on Cyber Security News<\/a>.<\/p>\n<\/div>\n

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Microsoft SQL Server Vulnerability Allows Attackers to Elevate Privileges over a Network Microsoft released security updates on January 13, 2026, addressing a critical elevation of privilege vulnerability in SQL Server that enables authorized attackers to bypass authentication controls and gain elevated system privileges remotely. Tracked as CVE-2026-20803, the vulnerability stems from missing authentication mechanisms for […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[129,63,158,131,648],"tags":[130],"class_list":["post-9892","post","type-post","status-publish","format-standard","hentry","category-cyber-security","category-cyber-security-news","category-microsoft","category-vulnerability","category-vulnerability-news","tag-cyber-security-news"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9892"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=9892"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/9892\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=9892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=9892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=9892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}