Affects Juniper Junos routing daemon used widely in enterprise networks; unauthenticated LDP peer can crash routers or achieve RCE — potentially disruptive to network infrastructure.
CVE-2026-101981
Unauthenticated LDP message can crash rpd or enable remote code execution in Junos.
Is CVE-2026-101981 being exploited?
Not confirmed. CVE-2026-101981 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 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-101981?
CVE-2026-101981 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-2026-101981?
Yes. A fix has been recorded for CVE-2026-101981. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-101981 affect?
CVE-2026-101981 affects Juniper Junos OS rpd, Junos OS Evolved rpd, Routers running LDP (MX, vMX, PTX, similar). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-101981?
Apply Juniper update immediately; restrict LDP adjacencies and monitor rpd logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
An adjacent unauthenticated LDP peer can crash the rpd process or execute arbitrary code on Junos routing devices.
Immediate action required
- 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>= 23.4 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.