CVE-2026-101990

criticalpriority · track · 39EPSS 0.006 · 47 %ileFRRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.57% (47th) EPSS

CVSS 9.8 · critical

Is it mine?

17 products

Check your exposure

Who says so?

2 sources

fstec_bdu · certfr

EPSS · scored 2026-10-28

A Stack-based Buffer Overflow vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a remote configured BGP peer to cause an rpd crash, or on Junos OS remote code-execution, via sending a flow-spec update which is selected for re-advertisement.

01

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8.1–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · sirt@juniper.net USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v4.09.3criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · sirt@juniper.net US

v4.08.1highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-121US

04

affected products (17)

Products and version ranges known to be affected.

Juniper Networks Inc. Junos OS≤ 23.2R2-S7.7fstec_bduRU
Juniper Networks Inc. Junos OS23.4 → 23.4R2-S8.13fstec_bduRU
Juniper Networks Inc. Junos OS24.2 → 24.2R2-S5.5fstec_bduRU
Juniper Networks Inc. Junos OS24.4 → 24.4R2-S5fstec_bduRU
Juniper Networks Inc. Junos OS25.2 → 25.2R2-S2fstec_bduRU
Juniper Networks Inc. Junos OS25.4 → 25.4R1-S3fstec_bduRU
Juniper Networks Inc. Junos OS26.2 → 26.2R1-S2fstec_bduRU
Juniper Networks Inc. Junos OS Evolved≤ 23.2R2-S7.7-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved≤ 23.4X100-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved23.4 → 23.4R2-S8.11-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved24.2 → 24.2R2-S5.6-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved24.4 → 24.4R2-S5-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved25.2 → 25.2R2-S2-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved25.2X100 → 25.2X100-D35-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved25.4 → 25.4R1-S3-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved25.4X300 → 25.4X300-D40-EVOfstec_bduRU
Juniper Networks Inc. Junos OS Evolved26.2 → 26.2R1-S2-EVOfstec_bduRU

05

advisories (1)

Vendor and ecosystem advisories describing this.

CERTFR-2026-AVI-1322Multiples vulnérabilités dans les produits Juniper NetworksFrançais2026-10-15vendor · certfrFR

06

also known as (2)

Other names and identifiers for this entity.

BDU:2026-17810 fstec_bdu
JSA ID:112187fstec_bdu

07

sources

Which sources assert this record, and when.

fstec_bdu certfr NVD CVE.org MITRE

published 2026-10-14modified 2026-10-27

08

references (1) nvd

External citations — patches, advisories, analysis.

https://supportportal.juniper.net/JSA112187

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.