CVE-2026-47731
Unauthenticated path‑traversal in AMMOS BSC allows remote file append as ait-bsc user
Is CVE-2026-47731 being exploited?
Not confirmed. CVE-2026-47731 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 0.86% probability of exploitation in the next 30 days.
How severe is CVE-2026-47731?
CVE-2026-47731 is rated Critical with a CVSS score of 9.1. 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-2026-47731?
Yes. A fix has been recorded for CVE-2026-47731. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47731 affect?
CVE-2026-47731 affects AMMOS Instrument Toolkit (AIT-Core) BSC, ait-bsc server, AIT-Core versions < 3.1.1, AIT-Core 2.x < 2.6.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47731?
Upgrade to AIT-Core 3.1.1 or 2.6.1; restrict/ firewall access to ait-bsc; audit files/logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attackers can traverse paths and append arbitrary data to files as the ait-bsc process user, enabling file tampering, code injection, or privilege escalation.
Immediate action required
- affected< 2.6.1
- affected= 3.1.0
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.