TI-2026-74210 Aliases CVE-2026-101985

Junos OS Evolved rpd flaw lets IS-IS peers cause denial of service

LOW 31CWE-1284Published 2026-10-14 · Updated 2026-10-14

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 Evolved on PTX Series is affected in releases from 23.4 before 23.4R2-S8.11-EVO, along with the other listed ranges. The routing protocol daemon (rpd) does not properly validate a specified quantity in input (CWE-1284), which causes a crash when BIER over IS-IS is enabled. An unauthenticated IS-IS peer can trigger the crash and cause a denial of service.

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

Description from the CNA

A Improper Validation of Specified Quantity in Input vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS Evolved on PTX Series allows an unauthenticated IS-IS peer to cause a denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00269 19th percentileScored 2026-11-07

Fix Fixed Junos OS Evolved (Juniper Networks): 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO +5

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Juniper	Junos OS Evolved	23.4 to before 23.4R2-S8.11-EVO; 24.2 to before 24.2R2-S5.6-EVO; 24.4 to before 24.4R2-S5-EVO; 25.2 to before 25.2R2-S2-EVO; 25.4 to before 25.4R1-S3-EVO; 26.2 to before 26.2R1-S2-EVO; 23.4X100; 25.2X100 to before 25.2X100-D35-EVO; 25.4X300 to before 25.4X300-D40-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	Patch available	CNA

Junos OS Evolved VendorJuniper Affected 23.4 to before 23.4R2-S8.11-EVO; 24.2 to before 24.2R2-S5.6-EVO; 24.4 to before 24.4R2-S5-EVO; 25.2 to before 25.2R2-S2-EVO; 25.4 to before 25.4R1-S3-EVO; 26.2 to before 26.2R1-S2-EVO; 23.4X100; 25.2X100 to before 25.2X100-D35-EVO; 25.4X300 to before 25.4X300-D40-EVO Fixed in 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 Patch available CNA

CPE names Threatist (inferred) · 1

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

CPE	Versions	Role	Vendor
cpe:2.3:o:juniper:junos_os_evolved::::::::	—	—	Juniper

cpe:2.3:o:juniper:junos_os_evolved:*:*:*:*:*:*:*:* Versions — — ·Juniper

Remediation

Upgrade Junos OS Evolved to 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 or 25.4X300-D40-EVO, or a later release in the same train. The sources list no vendor advisory identifier for this fix.

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

Fix · CNA Junos OS Evolved (Juniper Networks) Fixed in 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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2026-10-14
Juniper Networks Junos OS Evolved — supportportal.juniper.net/JSA112250
12 records Highest priority Priority MEDIUM 8 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2026-74245 OS command injection in Junos OS Evolved TACACS+ allows root commandsPriority MEDIUM 52
- TI-2026-74199 OS command injection in Junos OS Evolved zero-touch provisioningPriority MEDIUM 49
- TI-2026-74281 Stack buffer overflow in Junos OS Evolved kernel causes kernel panicPriority MEDIUM 47
Show all 12 records → Advisory →

Timeline

2026-10-15 Threatist record created from CVE-2026-101985

References

Advisory 1

https://supportportal.juniper.net/JSA112250

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