How severe is CVE-2026-25772?

CVE-2026-25772 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-25772 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25772?

CVE-2026-25772 affects Wazuh. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25772?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25772 have an EU (EUVD) identifier?

Yes. CVE-2026-25772 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12621.

When was CVE-2026-25772 published?

CVE-2026-25772 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-25772

CVE-2026-25772 is a medium-severity vulnerability in Wazuh with a CVSS 3.x base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12621
Weakness: CWE-121
Affected product: Wazuh
Published: 2026-03-17
Last modified: 2026-06-17

Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.14.3, a stack-based buffer overflow vulnerability exists in the Wazuh Database synchronization module (`wdb_delta_event.c`). The SQL query construction logic allows for an integer underflow when calculating the remaining buffer size. This occurs because the code incorrectly aggregates the return value of `snprintf`. If a specific database synchronization payload exceeds the size of the query buffer (2048 bytes), the size calculation wraps around to a massive integer, effectively removing bounds checking for subsequent writes. This allows an attacker to corrupt the stack, leading to a Denial of Service (DoS) or potentially RCE. Version 4.14.3 fixes the issue.

Frequently asked questions

What is CVE-2026-25772?: Wazuh is a free and open source platform used for threat prevention, detection, and response. Starting in version 4.4.0 and prior to version 4.14.3, a stack-based buffer overflow vulnerability exists in the Wazuh Database synchronization module (`wdb_delta_event.c`). The SQL query construction logic allows for an integer underflow when calculating the remaining buffer size. This occurs because the code incorrectly aggregates the return value of `snprintf`. If a specific database synchronization payload exceeds the size of the query buffer (2048 bytes), the size calculation wraps around to a massive integer, effectively removing bounds checking for subsequent writes. This allows an attacker to corrupt the stack, leading to a Denial of Service (DoS) or potentially RCE. Version 4.14.3 fixes the issue.
How severe is CVE-2026-25772?: CVE-2026-25772 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-25772 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25772?: CVE-2026-25772 affects Wazuh. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25772?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25772 have an EU (EUVD) identifier?: Yes. CVE-2026-25772 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12621.
When was CVE-2026-25772 published?: CVE-2026-25772 was published on 2026-03-17 and last updated on 2026-06-17.

References

https://github.com/wazuh/wazuh/security/advisories/GHSA-h7vp-j34v-h6j5

Affected products (1)

cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*

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