Is CVE-2026-66360 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-66360?

CVE-2026-66360 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-66360

Description

The ISO Presentation layer contains a flaw in the handling of specific parameters during normal mode negotiation. A missing length check in the processing of the encoded presentation data allows an attacker controlled field with a zero length value to trigger a bounded heap over read. This condition occurs before MMS session establishment, a crafted TCP/102 connection attempt can trigger the issue. The resulting over read causes the process to terminate, leading to a denial of service condition.