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Back to active CVEs
High · CVSS 8.7CVE-2026-33798

Junos OS and Junos OS Evolved: SRX Series: An attacker causes remote code execution when SRX chassis-cluster is enabledCVE-2026-33798

Answer in brief

CVE-2026-33798 records a High severity (CVSS 8.7) vulnerability in Junos OS and Junos OS Evolved: SRX Series: An attacker causes remote code execution when SRX chassis-cluster is enabled. The current sources do not mark it as known exploited. The current feed maps Juniper Networks/Junos OS (generic), Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 14, 2026Updated Oct 14, 2026Source checked Oct 14, 2026First seen by HOL Oct 14, 2026Material review Oct 14, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Juniper Networks/Junos OS (generic), Juniper Networks/Junos OS Evolved (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Juniper Networks/Junos OSgeneric>=0 <23.2R2-S7.7 || >=23.4 <23.4R2-S8.13 || >=24.2 <24.2R2-S5.5 || >=24.4 <24.4R2-S5 || >=25.2 <25.2R2-S2 || >=25.4 <25.4R1-S3 || >=26.2 <26.2R1-S223.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 26.2R1-S2
Juniper Networks/Junos OS Evolvedgeneric>=0 <23.2R2-S7.7-EVO || >=23.4 <23.4R2-S8.11-EVO || >=24.2 <24.2R2-S5.6-EVO || >=24.4 <24.4R2-S5-EVO || >=25.2 <25.2R2-S2-EVO || >=25.4 <25.4R1-S3-EVO || >=26.2 <26.2R1-S2-EVO || 23.4X100 || >=25.2X100 <25.2X100-D35-EVO || >=25.4X300 <25.4X300-D40-EVO23.2R2-S7.7-EVO, 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, 25.2X100-D35-EVO, 25.4X300-D40-EVO

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Juniper Networks/Junos OS, Juniper Networks/Junos OS Evolved.
  2. 2Review the reported fix. Source-reported solution: The following software releases have been updated to resolve this specific issue: Junos OS: 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 25.4R2, 26.2R1-S2, 26.2R2, 26.4R1, and all subsequent releases. Junos OS Evolved: 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.2X100-D35-EVO, 25.4R1-S3-EVO, 25.4R2-EVO, 25.4X300-D40-EVO, 26.2R1-S2-EVO, 26.2R2-EVO, 26.4R1-EVO, and all subsequent releases. Note: For Junos OS releases 23.2, 23.4, and 24.2, and Junos OS Evolved releases 23.2-EVO, 23.4-EVO, and 24.2-EVO, specific respins have been referenced. Previously published versions of these releases have been rebuilt to resolve the security vulnerabilities identified in this advisory.

Evidence timeline and material changes

  1. Published upstream

    Oct 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 14, 2026

Sources and claim methodology

  • Source referencesupportportal.juniper.net
Upstream source description

A Stack-based Buffer Overflow vulnerability in the srxpfe of Juniper Networks Junos OS and Junos OS Evolved on the SRX Series allows an L2-adjacent attacker to execute arbitrary code as root via high-availability fabric traffic.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Junos OS and Junos OS Evolved: In a scenario with VPN-flowspec and BMP monitoring a specific BGP update causes an rpd crashSame juniper networks/junos os package
  • Junos OS and Junos OS Evolved: A specific BGP ISO-VPN update causes an rpd crash when BMP or NSR is enabledSame juniper networks/junos os package
  • Junos OS and Junos OS Evolved: Unauthenticated network access causes full device takeover when J-Web is enabledSame juniper networks/junos os package
  • PAN-OS: Authenticated Remote Code Execution (RCE) in the Management InterfaceSame generic ecosystem
  • dbt: Unauthenticated Arbitrary SQL Execution in `dbt docs serve`Same generic ecosystem
  • SeaweedFS: Hard-coded SSH host key can be presented by certain standalone SFTP Helm deploymentsSame generic ecosystem

Record context

Vulnerability class
RCE
EPSS
Not reported
CWE IDs
CWE-121
Source
CVE List V5
Source checked
Oct 14, 2026
References
1 linked source
Open source record