CVE-2025-52958

Routing-service crash via BGP error-path assertion

Published Jul 11, 2025 · Updated Jul 11, 2025

Reachable assertion in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers on an adjacent network to crash rpd. With route validation enabled, a failed connection request during BGP initial session establishment reaches an assertion in rpd's error-handling path, causing the daemon to crash and restart. Repeated session-establishment failures can sustain the routing-service interruption; the record discloses no confidentiality or integrity impact.

CVSS severity6.0

Medium

EPSS probability0.21%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2025-52958
Published: Jul 11, 2025
Updated: Jul 11, 2025

Vendor: Juniper Networks
Product: Junos OS Evolved
Classifications: CWE-617, T1499

Attack vector: adjacent
Privileges: unauthenticated

Timeline

How it unfolded

Jul 11, 2025CVE publishedPublication date reported by the CVE source.
Jul 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=0 <22.2R3-S6-EVO
Affected versionversion=22.4 <22.4R3-S6-EVO
Affected versionversion=23.2 <23.2R2-S3-EVO
Affected versionversion=23.4 <23.4R2-S4-EVO
Affected versionversion=24.2 <24.2R2-EVO

What conditions does exploitation require?

Attack vectoradjacent

Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <22.2R3-S6-EVO; version=22.4 <22.4R3-S6-EVO; version=23.2 <23.2R2-S3-EVO; version=23.4 <23.4R2-S4-EVO; version=24.2 <24.2R2-EVO

Juniper Networks · Junos OSversion=0 <22.2R3-S6; version=22.4 <22.4R3-S6; version=23.2 <23.2R2-S3; version=23.4 <23.4R2-S4; version=24.2 <24.2R2

Published CVSS scores

6.0Juniper NetworksCVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A/RE:M/U:Green

5.3Juniper NetworksCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026

Latest reporting daySep 16, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectoradjacent

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-617Reachable Assertion

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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