CVE-2026-101976 | BDVDB-2026-389205 Detail

Juniper NetworksJunos OS

Description#

An Out-of-bounds Write vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an eBGP peer which has not negotiated four-octet-AS capability sending a specifically malformed BGP update to cause a Denial-of-Service (DoS).

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-787 Out-of-bounds Write

References#

https://supportportal.juniper.net/JSA112187

Exploit#

No public exploit known

History#

Version 12026-10-14Record published in the CVE List.

Published

Published: 2026-10-14
Last modified: 2026-10-14

Vendor information

Vendor: Juniper Networks
Product: Junos OS

All Juniper Networks vulnerabilities

Score

7.5 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 40.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 23.2R2-S7.7
Fixed
23.2R2-S7.7
Vulnerable
>= 23.4 and < 23.4R2-S8.13
Fixed
23.4R2-S8.13
Vulnerable
>= 24.2 and < 24.2R2-S5.5
Fixed
24.2R2-S5.5
Vulnerable
>= 24.4 and < 24.4R2-S5
Fixed
24.4R2-S5
Vulnerable
>= 25.2 and < 25.2R2-S2
Fixed
25.2R2-S2
Vulnerable
>= 25.4 and < 25.4R1-S3
Fixed
25.4R1-S3
Vulnerable
>= 26.2 and < 26.2R1-S2
Fixed
26.2R1-S2

Scoring System

CVSS v4.0

8.7 High

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	None
Vulnerable System Integrity	None
Vulnerable System Availability	High
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	Low

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).