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HIGH severity

CVE-2026-55002 — Sql Server 2016

HIGH

CVE-2026-55002 is a high-severity (CVSS 8.8) CWE-73 vulnerability in microsoft sql server 2016. A fix is available — see the affected versions and patch details below.

External control of file name or path in SQL Server allows an authorized attacker to elevate privileges over a network.

Published
Updated
Affected
5 products
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 12, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-55002.

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs59th percentile — riskier than 59% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-55002 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

External control of file name or path in SQL Server allows an authorized attacker to elevate privileges over a network.

Affected Products

5 products · 10 configurations
Application
sql server 2016microsoft
≥ 13.0.7000.253 && < 13.0.7095.1
range
Application
sql server 2017microsoft
≥ 14.0.3006.16 && < 14.0.3540.1
range
Application
sql server 2019microsoft
≥ 15.0.4003.23 && < 15.0.4480.2
range
Application
sql server 2022microsoft
≥ 16.0.4003.1 && < 16.0.4262.2
range
Application
sql server 2025microsoft
≥ 17.0.4006.2 && < 17.0.4060.2
range

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every microsoft sql server 2016 deployment and check each version against the affected-products list above.

  2. Fix

    Apply the microsoft sql server 2016 security patch or hotfix for CVE-2026-55002 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

External control of file name or path in SQL Server allows an authorized attacker to elevate privileges over a network.
O3 Security · Runtime Protection

Is CVE-2026-55002 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works
CVE-2026-55002: Sql Server 2016 (High 8.8)