CVE-2026-17561
Code injection in Logsign SIEM (<6.4.108) enabling execution of injected code.
Is CVE-2026-17561 being exploited?
Not confirmed. CVE-2026-17561 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-17561?
CVE-2026-17561 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-17561?
Yes. A fix has been recorded for CVE-2026-17561. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17561 affect?
CVE-2026-17561 affects Logsign SIEM < 6.4.108. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17561?
Apply Logsign 6.4.108+ immediately, restrict SIEM access, and audit logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Code injection leading to remote code execution as SIEM process user, allowing system compromise, alert/log manipulation, and data exfiltration.
Immediate action required
- affected< 6.4.115
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.