Affects Juniper Junos routing (widely deployed network infrastructure); can cause routing outages and service disruption across organizations and ISPs.
CVE-2026-102020
Authenticated BGP-LS updates can crash rpd, causing Junos router DoS.
Is CVE-2026-102020 being exploited?
Not confirmed. CVE-2026-102020 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 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-102020?
CVE-2026-102020 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-2026-102020?
Not known from our data. No patch reference has been recorded for CVE-2026-102020, 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-2026-102020 affect?
CVE-2026-102020 affects Juniper Junos OS, Juniper Junos OS Evolved, rpd routing process, Juniper routers/systems running Junos. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-102020?
Restrict/validate BGP‑LS peers, apply vendor mitigations, monitor rpd, install Juniper update when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated network attacker can trigger an rpd assertion via BGP‑LS updates, crashing the routing process and causing routing outages or device instability.
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
- affected< 23.2R2-S7.7-EVO
- affected>= 23.4 and < 23.4R2-S8.11-EVO
- affected>= 24.2 and < 24.2R2-S5.6-EVO
- affected>= 24.4 and < 24.4R2-S5-EVO
- affected>= 25.2 and < 25.2R2-S2-EVO
- affected>= 25.4 and < 25.4R1-S3-EVO
- affected>= 26.2 and < 26.2R1-S2-EVO
- affected23.4X100
- affected>= 25.2X100 and < 25.2X100-D35-EVO
- affected>= 25.4X300 and < 25.4X300-D40-EVO
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.