Medium

CVE-2025-59962 — Junos OS and Junos OS Evolved: With BGP sharding enabled, change in indirect next-hop can cause RPD crash

An Access of Uninitialized Pointer vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved with BGP sharding configured allows an attacker triggering indirect next-hop updates, along with timing outside the attacker's control, to cause rpd to crash and restart, leading to a Denial of Service (DoS). With BGP sharding enabled, triggering route resolution of an indirect next-hop (e.g., an IGP route change over which a BGP route gets resolved), may cause rpd to crash and restart. An attacker causing continuous IGP route churn, resulting in repeated route re-resolution, will increase the likelihood of triggering this issue, leading to a potentially extended DoS condition. This issue affects: Junos OS: * all versions before 21.4R3-S6, * from 22.1 before 22.1R3-S6, * from 22.2 before 22.2R3-S3, * from 22.3 before 22.3R3-S3, * from 22.4 before 22.4R3, * from 23.2 before 23.2R2; Junos OS Evolved: * all versions before 22.3R3-S3-EVO, * from 22.4 before 22.4R3-EVO, * from 23.2 before 23.2R2-EVO. Versions before Junos OS 21.3R1 and Junos OS Evolved 21.3R1-EVO are unaffected by this issue.

Published Oct 9, 2025 · Updated Oct 18, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: juniper

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1
Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 18, 2026

Affects

Juniper Networks

Junos and 2 more

CVSS base

5.3

Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Juniper Networks Junos, Juniper Networks Junos OS, Juniper Networks Junos Os Evolved).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Juniper Networks	Junos	version 22.3-r3version 22.2-r1-s2version 22.2-r2version 22.2-r2-s1version 22.2-r2-s2version 22.2-r3version 22.2-r3-s1version 22.2-r3-s2 and 50 more version 22.3version 22.3-r1version 22.3-r1-s1version 22.3-r1-s2version 22.3-r2version 22.3-r2-s1version 22.3-r2-s2version 21.4version 22.3-r3-s1version 22.3-r3-s2version 22.4version 22.4-r1version 22.4-r1-s1version 22.4-r1-s2version 22.4-r2version 22.4-r2-s1version 22.4-r2-s2version 23.2version 23.2-r1version 23.2-r1-s1version 23.2-r1-s2version 22.2-r1version 22.2-r1-s1< 21.4version 21.4-r1version 21.4-r1-s1version 21.4-r1-s2version 21.4-r2version 21.4-r2-s1version 21.4-r2-s2version 21.4-r3version 21.4-r3-s1version 21.4-r3-s2version 21.4-r3-s3version 21.4-r3-s4version 21.4-r3-s5version 22.1-r1version 22.2version 22.1-r3-s5version 22.1-r3-s4version 22.1-r3-s3version 22.1-r3-s2version 22.1-r3-s1version 22.1-r3version 22.1-r2-s2version 22.1-r2-s1version 22.1-r2version 22.1-r1-s2version 22.1-r1-s1version 22.1	Vulnerable	NIST National Vulnerability Database
Juniper Networks	Junos OS	≥ 23.2 and < 23.2R2≥ 22.1 and < 22.1R3-S6≥ 22.4 and < 22.4R3≥ 22.2 and < 22.2R3-S3≥ 21.4 and < 21.4R3-S6≥ 22.3 and < 22.3R3-S3	Vulnerable	CVE Program (cve.org) e CISA ADP
Juniper Networks	Junos Os Evolved	≥ 23.2 and < 23.2R2-EVO≥ 22.4 and < 22.4R3-EVO≥ 22.3 and < 22.3R3-S3-EVO	Vulnerable	CVE Program (cve.org) e CISA ADP
Juniper Networks	Junos Os Evolved	version 23.2-r1-s2version 23.2-r1-s1version 23.2-r1version 23.2version 22.4-r2-s2version 22.4-r2-s1version 22.4-r2version 22.4-r1-s2 and 14 more version 22.4-r1-s1version 22.4-r1version 22.4version 22.3-r3-s2version 22.3-r3-s1version 22.3-r3version 22.3-r2-s2version 22.3-r2-s1version 22.3-r2version 22.3-r1-s2version 22.3-r1-s1version 22.3-r1version 22.3< 22.3	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Adjacent

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.0	CVSS 4.0	Medium	—	—	sirt@juniper.net via NIST National Vulnerability Database
6.0	CVSS 4.0	Medium	—	—	juniper via CVE Program (cve.org) e CISA ADP
5.3	CVSS 3.1	Medium	1.6	3.6	sirt@juniper.net via NIST National Vulnerability Database
5.3	CVSS 3.1	Medium	—	—	GitHub, Inc. via GitHub Security Advisories
5.3	CVSS 3.1	Medium	—	—	juniper via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H (score shown at the top: sirt@juniper.net)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-824

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · juniper networks/junos os, juniper networks/junos os evolved
Oct 18, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 18, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 18, 2026
Affected products added · juniper/junos, juniper/junos os evolved
Oct 18, 2026 · NIST National Vulnerability Database
CVSS changed · 5.3
Oct 18, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 18, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 18, 2026 · Alertas do Telegram
2025
CVE published
Oct 9, 2025 · juniper

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 18, 2026 – Oct 18, 2026
1× Official description updated · Oct 18, 2026 – Oct 18, 2026

References

3 on the record

supportportal.juniper.net/JSA103151
Vendor Advisory, vendor-advisory, NIST National Vulnerability Database
github.com/advisories/GHSA-qpxp-m556-4mcr
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2025-59962
GitHub Security Advisories

Elsewhere on this site

Juniper Networks
every CVE for this vendor

CWE-824
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-101982 Junos OS and Junos OS Evolved: A EVPN peer causes an rpd crash or root-level compromise when EVPN-VPWS is used 4d
Critical CVE-2026-101983 Junos OS and Junos OS Evolved: An attacker causes remote code execution when J-Web virtual-domain is configured 4d
High CVE-2026-102077 Junos OS: MX Series with SPC3: In a source NAT scenario malformed packets will lead to resource leaks and eventually traffic stops 4d
High CVE-2026-101979 Junos OS and Junos OS Evolved: A network attacker causes root-level code execution or denial of service when SNMP and AAA are enabled 4d
High CVE-2026-101976 Junos OS and Junos OS Evolved: In a non-4byte-AS scenario a specific BGP update causes an rpd crash 4d
High CVE-2026-101981 Junos OS and Junos OS Evolved: An adjacent LDP peer causes routing-engine compromise when LDP is enabled 4d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-59962 is "Junos OS and Junos OS Evolved: With BGP sharding enabled, change in indirect next-hop can cause RPD crash", rated Medium. It affects Junos (Juniper Networks); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.3 describes technical severity. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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