Advisory severityHigh8.8Juniper Networks Updated

High [CVE-2026-101981] Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent LDP peer to cause an rpd crash or execute arbitrary code via a malformed LDP Label Mapping message

This high-severity Juniper Networks advisory covers CVE-2026-101981 affecting Junos OS Evolved.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-101981 Source published Oct 15, 2026Source updated Oct 16, 2026

VulniPulse record published Oct 15, 2026Record updated Oct 21, 2026

CVE-2026-101981

Affected products & platforms

Juniper NetworksJunosJunos OS Evolved

Open source advisory

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Summary

A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent LDP peer to cause an rpd crash or execute arbitrary code via a malformed LDP Label Mapping message.

Affected versions

Junos OS 23.4 before 23.4R2-S8.13
Junos OS 24.2 before 24.2R2-S5.5
Junos OS 24.4 before 24.4R2-S5
Junos OS 25.2 before 25.2R2-S2
Junos OS 25.4 before 25.4R1-S3
Junos OS 26.2 before 26.2R1-S2
Junos OS Evolved 23.4 before 23.4R2-S8.11-EVO
Junos OS Evolved 24.2 before 24.2R2-S5.6-EVO
Junos OS Evolved 24.4 before 24.4R2-S5-EVO
Junos OS Evolved 25.2 before 25.2R2-S2-EVO
Junos OS Evolved 25.4 before 25.4R1-S3-EVO
Junos OS Evolved 26.2 before 26.2R1-S2-EVO

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions

23.4R2-S8.13
24.2R2-S5.5
24.4R2-S5
25.2R2-S2
25.4R1-S3
26.2R1-S2
23.4R2-S8.11-EVO
24.2R2-S5.6-EVO
24.4R2-S5-EVO
25.2R2-S2-EVO
25.4R1-S3-EVO
26.2R1-S2-EVO

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation

Upgrade to a fixed release: 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 26.2R1-S2. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Juniper Networks
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-101981 instead of the raw feed document.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-101981NVD CVE.org MITRE

Official resources

Junos OS software downloads & install/upgrade (target: 23.4R2-S8.13 / 24.2R2-S5.5 / 24.4R2-S5)
Official documentation
This advisory names 23.4R2-S8.13 / 24.2R2-S5.5 / 24.4R2-S5 as the first fixed releases — official upgrade documentation for Junos OS on SRX / MX / EX / QFX.
Junos OS release & EOL / support dates
Release notes
Confirm your train is still supported and pick a fixed maintenance release.
Juniper Security Advisories portal
Official documentation
Canonical Juniper SIRT advisory portal — search here for the full JSA text and revisions.

Discussion(0)

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