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CVE-2026-28221

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 4.8.0 to before version 4.14.4, a stack-based buffer overflow exists in print_hex_string() in wazuh-remoted. The bug is triggered when formatting attacker-controlled bytes using sprintf(dst_buf + 2*i, "%.2x", src_buf[i]) on platforms where char is treated as signed and the compiled code sign-extends bytes before the variadic call. For input bytes such as 0xFF, the formatting can emit "fffff
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ad4fd837e59a797a44f5cacf68cdbc84a03049aaf59e9297b4d8f635eba96546
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"wazuh","vendor":"wazuh","versions":[{"status":"affected","version":">= 4.8.0, < 4.14.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-121","description":"CWE-121: Stack-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/wazuh/wazuh/releases/tag/v4.14.4","tags":["x_refsource_MISC"],"url":"https://github.com/wazuh/wazuh/releases/tag/v4.14.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-q9vv-7w4c-f4cm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/adp/0/references/0
{"name":"https://github.com/wazuh/wazuh/security/advisories/GHSA-q9vv-7w4c-f4cm","tags":["x_refsource_CONFIRM"],"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-q9vv-7w4c-f4cm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d554e31a7944d6d4c042e5f7954af9e9508c228478c80988f53bc8766469c587 · sha256:88315b5937f052cf… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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