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TI-2026-74295 Aliases CVE-2026-102087

Junos OS and Junos OS Evolved rpd crashes on a specific BGP update

Priority LOW 31CWE-184Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Juniper Networks Junos OS and Junos OS Evolved are affected in all versions before the fixed releases listed in the solution. The routing protocol daemon (rpd) fails to reject a specific valid, optional, non-transitive BGP update (CWE-184), so it crashes and restarts when that update arrives over an established BGP session in a BGP traffic engineering scenario. An unauthenticated, adjacent attacker can cause a denial of service, with traffic impact until routing reconverges.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

An Incomplete List of Disallowed Inputs vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When in a BGP traffic engineering scenario a specific, valid, optional, non-transitive BGP update is received over an established BGP session, RPD crashes and automatically restarts, which leads to traffic impact until routing has reconverged. This issue affects: Junos OS: * All versions before 23.2R2-S6; * 23.4 versions before 23.4R2-S7; * 24.2 versions before 24.2R2-S4; * 24.4 versions before 24.4R2-S4; * 25.2 versions before 25.2R1-S2, 25.2R2; Junos OS Evolved: * All versions before 23.2R2-S6-EVO; * 23.4 versions before 23.4R2-S8.11-EVO; * 24.2 versions before 24.2R2-S4-EVO; * 24.4 versions before 24.4R2-S5-EVO; * 25.2 versions before 25.2R1-S2-EVO, 25.2R2-EVO;

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00251 16th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 23.2R2-S6, 23.4R2-S7, 24.2R2-S4 +3Junos OS Evolved (Juniper Networks): 23.2R2-S6-EVO, 23.4R2-S8.11-EVO, 24.2R2-S4-EVO +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OSbefore 23.2R2-S6; 23.4 to before 23.4R2-S7; 24.2 to before 24.2R2-S4; 24.4 to before 24.4R2-S4; 25.2 to before 25.2R1-S2, 25.2R223.2R2-S6, 23.4R2-S7, 24.2R2-S4, 24.4R2-S4, 25.2R1-S2, 25.2R2Patch availableCNA
JuniperJunos OS Evolvedbefore 23.2R2-S6-EVO; 23.4 to before 23.4R2-S8.11-EVO; 24.2 to before 24.2R2-S4-EVO; 24.4 to before 24.4R2-S5-EVO; 25.2 to before 25.2R1-S2-EVO, 25.2R2-EVO23.2R2-S6-EVO, 23.4R2-S8.11-EVO, 24.2R2-S4-EVO, 24.4R2-S5-EVO, 25.2R1-S2-EVO, 25.2R2-EVOPatch availableCNA
  • Junos OS VendorJuniper Affected before 23.2R2-S6; 23.4 to before 23.4R2-S7; 24.2 to before 24.2R2-S4; 24.4 to before 24.4R2-S4; 25.2 to before 25.2R1-S2, 25.2R2 Fixed in 23.2R2-S6, 23.4R2-S7, 24.2R2-S4, 24.4R2-S4, 25.2R1-S2, 25.2R2 Patch available CNA
  • Junos OS Evolved VendorJuniper Affected before 23.2R2-S6-EVO; 23.4 to before 23.4R2-S8.11-EVO; 24.2 to before 24.2R2-S4-EVO; 24.4 to before 24.4R2-S5-EVO; 25.2 to before 25.2R1-S2-EVO, 25.2R2-EVO Fixed in 23.2R2-S6-EVO, 23.4R2-S8.11-EVO, 24.2R2-S4-EVO, 24.4R2-S5-EVO, 25.2R1-S2-EVO, 25.2R2-EVO Patch available CNA

CPE names Threatist (inferred) · 2

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*——Juniper
cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:*——Juniper
  • cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:* Versions — — ·Juniper
  • cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* Versions — — ·Juniper

Remediation

Upgrade Junos OS to 23.2R2-S6, 23.4R2-S7, 24.2R2-S4, 24.4R2-S4, 25.2R1-S2 or 25.2R2. Upgrade Junos OS Evolved to 23.2R2-S6-EVO, 23.4R2-S8.11-EVO, 24.2R2-S4-EVO, 24.4R2-S5-EVO, 25.2R1-S2-EVO or 25.2R2-EVO.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 23.2R2-S6, 23.4R2-S7, 24.2R2-S4, 24.4R2-S4, 25.2R1-S2, 25.2R2
  • Fix · CNA Junos OS Evolved (Juniper Networks) Fixed in 23.2R2-S6-EVO, 23.4R2-S8.11-EVO, 24.2R2-S4-EVO, 24.4R2-S5-EVO, 25.2R1-S2-EVO, 25.2R2-EVO

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-102087

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06436 Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-20885 Apache Commons Text prior to 1.10.0 allows RCE when applied to untrusted input due to insecure interpolation defaults CVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
See all 1284 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences