CVE-2026-27636
RCE via .htaccess upload in FreeScout on Apache AllowOverride All.
Is CVE-2026-27636 being exploited?
Not confirmed. CVE-2026-27636 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 2.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-27636?
CVE-2026-27636 is rated High with a CVSS score of 8.8. 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-2026-27636?
Yes. A fix has been recorded for CVE-2026-27636. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27636 affect?
CVE-2026-27636 affects FreeScout (self-hosted). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27636?
Upgrade to 1.8.206; apply patch; review upload controls and Apache config
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can upload .htaccess to alter processing, enabling remote code execution and possible full server compromise.
Immediate action required
- affected< 1.8.206
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.