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  4. CVE 2026 101968 junos os and junos os evolved ex series mx series
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-101968

Junos OS and Junos OS Evolved: EX Series, MX Series, ACX Series: An attacker causes rpd heap memory disclosure when Rosen-MVPN data-MDT is enabledCVE-2026-101968

Answer in brief

CVE-2026-101968 records a Medium severity (CVSS 5.3) vulnerability in Junos OS and Junos OS Evolved: EX Series, MX Series, ACX Series: An attacker causes rpd heap memory disclosure when Rosen-MVPN data-MDT 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
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. 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

An Integer Underflow (Wrap or Wraparound) vulnerability in the rpd process of Juniper Networks Junos OS on EX Series and MX Series, and Junos OS Evolved on ACX Series allows an unauthenticated adjacent attacker to cause heap memory disclosure and multicast join-state injection via a malformed Rosen-MVPN message. This issue only affects platforms that support draft Rosen MVPN, such as the ACX Series, EX Series, and MX Series.

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
  • Mongoose: Unauthenticated remote heap out-of-bounds read in built-in TLS: off-by-one length check in mg_tls_recv_record() underflows recv_len to SIZE_MAXAlso CWE-191
  • Dpdk: dpdk: guest with runt rx descriptors underflows copy length in vhost enqueue (split and packed rings)Also CWE-191
  • PAN-OS: Authenticated Remote Code Execution (RCE) in the Management InterfaceSame generic ecosystem

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-191
Source
CVE List V5
Source checked
Oct 14, 2026
References
1 linked source
Open source record