Service interruption via wrapped snprintf size calculation
Published Mar 17, 2026 · Updated Mar 17, 2026
Stack-based buffer overflow in Wazuh 4.4.0 through 4.14.2 allows remote authenticated users to interrupt the manager via database sync. In wdb_upsert_dbsync and wdb_delete_dbsync, snprintf truncation lengths are added to query_actual_size, so the next remaining-size subtraction wraps and permits writes beyond the 2,048-byte query buffer. High-privilege access to database synchronization is required; the vendor establishes stack corruption and denial of service, but not code execution.
Summary
What happened
Stack-based buffer overflow in Wazuh 4.4.0 through 4.14.2 allows remote authenticated users to interrupt the manager via database sync. In wdb_upsert_dbsync and wdb_delete_dbsync, snprintf truncation lengths are added to query_actual_size, so the next remaining-size subtraction wraps and permits writes beyond the 2,048-byte query buffer. High-privilege access to database synchronization is required; the vendor establishes stack corruption and denial of service, but not code execution.
The record
- CVE
- CVE-2026-25772
- Published
- Mar 17, 2026
- Updated
- Mar 17, 2026
- Vendor
- Wazuh
- Product
- Wazuh
- Classifications
- CWE-121, CWE-191, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 17, 2026CVE publishedPublication date reported by the CVE source.
- Mar 17, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 4.4.0, < 4.14.3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Wazuh snprintf overflow test harnessproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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