Affects Juniper core networking (Junos Fusion aggregation); allows DoS and potential root code execution on infrastructure used across industries.
CVE-2026-102069
Stack buffer overflow in Junos dot1x on Fusion Aggregation enables DoS or root RCE.
Is CVE-2026-102069 being exploited?
Not confirmed. CVE-2026-102069 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-102069?
CVE-2026-102069 is rated High with a CVSS score of 8.7. 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-2026-102069?
Not known from our data. No patch reference has been recorded for CVE-2026-102069, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-102069 affect?
CVE-2026-102069 affects Juniper Junos OS (Junos Fusion Aggregation Devices), dot1x daemon, Fusion satellite/aggregation topologies with dot1x sync enabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-102069?
Follow Juniper advisory, restrict ICCP peer access, apply fixes ASAP.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
An adjacent ICCP peer can trigger a stack buffer overflow to crash devices or execute code as root, disrupting network infrastructure.
Immediate action required
- affected< 23.2R2-S7.7
- affected>= 23.4 and < 23.4R2-S8.13
- affected>= 24.2 and < 24.2R2-S5.5
- affected>= 24.4 and < 24.4R2-S5
- affected>= 25.2 and < 25.2R2-S2
- affected>= 25.4 and < 25.4R1-S3
- affected>= 26.2 and < 26.2R1-S2
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.