CVE-2026-28289
RCE in FreeScout 1.8.206 via crafted .htaccess upload bypass (TOCTOU).
Is CVE-2026-28289 being exploited?
Not confirmed. CVE-2026-28289 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 31% probability of exploitation in the next 30 days.
How severe is CVE-2026-28289?
CVE-2026-28289 is rated Critical with a CVSS score of 10.0. 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-2026-28289?
Yes. A fix has been recorded for CVE-2026-28289. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28289 affect?
CVE-2026-28289 affects FreeScout <= 1.8.206. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28289?
Patch to 1.8.207+ now
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user with file upload perms can execute server code by uploading a malicious .htaccess; TOCTOU bypass in sanitizeUploadedFileName.
Immediate action required
- affected< 1.8.207
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.