Remote root exploit in Juniper Junos rpd affecting widely deployed routing hardware; can cause device takeover and large-scale network outages.
CVE-2026-33796
Stack-based overflow in Juniper rpd allows remote root via BMP from external BGP neighbor
Is CVE-2026-33796 being exploited?
Not confirmed. CVE-2026-33796 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 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-33796?
CVE-2026-33796 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-2026-33796?
Not known from our data. No patch reference has been recorded for CVE-2026-33796, 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-2026-33796 affect?
CVE-2026-33796 affects Juniper Junos OS rpd, Juniper Junos OS Evolved rpd, Juniper MX/QFX/EX/ACX/PTX routers & switches running vulnerable rpd. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33796?
Check Juniper advisory, apply vendor updates/mitigations, restrict/validate BMP & external BGP neighbors, isolate impacted devices.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote root code execution on Junos devices via BMP messages from a configured external BGP neighbor; full device takeover and network disruption.
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.