CVE-2026-27515
Predictable session IDs allow hijack of Binardat switch web UI
Is CVE-2026-27515 being exploited?
Not confirmed. CVE-2026-27515 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-27515?
CVE-2026-27515 is rated Critical with a CVSS score of 9.3. 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-2026-27515?
Yes. A fix has been recorded for CVE-2026-27515. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-27515 affect?
CVE-2026-27515 affects Binardat 10G08-0800GSM switches (firmware < V300SP10260209). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-27515?
Upgrade to firmware V300SP10260209 or newer
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can hijack authenticated management sessions via guessing web UI session IDs, enabling config access.
Patch when possible
- affected< V300SP10260209
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.