CVE-2026-66732
On-path UDP session forgery via 2-byte connection handle, enabling injection and termination.
Is CVE-2026-66732 being exploited?
Not confirmed. CVE-2026-66732 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 0.12% probability of exploitation in the next 30 days.
How severe is CVE-2026-66732?
CVE-2026-66732 is rated High. 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-2026-66732?
Yes. A fix has been recorded for CVE-2026-66732. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66732 affect?
CVE-2026-66732 affects Sonic 3 A.I.R. (pre-commit 2492d18), ConnectionManager component. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66732?
Update to commit 2492d18+; restrict UDP exposure and monitor sessions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
On-path attacker observing cleartext UDP can inject forged packets by guessing the 2-byte handle, enabling session termination, arbitrary channel/message forgery, and forged responses.
Patch when possible
- affected<= 26.03.28.0
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.