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CVE-2026-102040

Junos OS and Junos OS Evolved: An attacker crashes the routing daemon when co-routed bidirectional RSVP LSPs are used

CVSS score

6.5

EPSS probability

%0.3

Risk score

0.0

Published

4 d ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

DoS Vulnerability in Juniper Networks Junos OS and Junos OS Evolved

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A NULL Pointer Dereference vulnerability in the rpd routing daemon of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to crash the routing daemon and cause a denial of service via an RSVP Path message.

Why does it matter?

This vulnerability allows attackers to cause a denial of service and disrupt critical routing processes on target systems. Since the patch status remains unknown, monitoring official vendor advisories is crucial.

What should be done?

  • Follow official vendor advisories and recommendations
  • Review the provided security bulletins
  • Apply upcoming updates for affected versions
Chain of evidence and sources3 verified claims

Juniper Networks Junos OS ve Junos OS Evolved ürünlerinin rpd routing daemon bileşeninde NULL Pointer Dereference zafiyeti bulunmaktadır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Kimlik doğrulaması gerektirmeyen bitişik bir saldırgan, RSVP Path mesajı ile yönlendirme daemon sürecini çökertip hizmet reddine sebep olabilir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Yama durumu resmî kaynaklarda henüz doğrulanamamıştır.

S0 · daybreach-canonical
Show the technical text from the sources

A NULL Pointer Dereference vulnerability in the rpd routing daemon of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to crash the routing daemon and cause a denial of service via an RSVP Path message.

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

CWE: CWE-476

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-102040 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Juniper NetworksJunos OS View
2Juniper NetworksJunos OS Evolved View
Total affected vendors: 1|Products: 2

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
7.1CVSS V40HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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:Y/R:A/V:C/RE:M/U:XNVD
7.1CVSS V4_0HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:MCVE CNA
6.5CVSS V31MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD
6.5CVSS V3_1MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-102040 is associated with the following CWEs:

CWE-476: NULL Pointer Dereference

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-102040 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureBitişik ağ
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://supportportal.juniper.net/JSA112187vendor-advisory

CVSS Vector Radar Chart

6.5 / 10
Attack VectorAdjacentComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityHigh

Vulnerability Scoring Details

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack VectorAdjacent network
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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JN
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Juniper Networks

Weakness Type (CWE & CAPEC)

CWE-476

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