CVE-2025-52949

Routing service interruption via malformed BGP packet

Published Jul 11, 2025 · Updated Jul 11, 2025

CWE-130 in rpd in Juniper Networks Junos OS and Junos OS Evolved allows attackers to restart routing via malformed BGP packets. The daemon mishandles inconsistent length parameters while processing a crafted BGP update, causing rpd to crash and restart. Exposure requires EVPN signaling and an iBGP or eBGP peer over IPv4 or IPv6; repeated packets sustain the routing-service interruption.

CVSS severity7.1

High

EPSS probability0.27%

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-2025-52949
Published: Jul 11, 2025
Updated: Jul 11, 2025

Vendor: Juniper Networks
Product: Junos OS Evolved
Classifications: CWE-130, T1499.004

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

Affected versionversion=0 <22.2R3-S7-EVO
Affected versionversion=22.4-EVO <22.4R3-S7-EVO
Affected versionversion=23.2-EVO <23.2R2-S4-EVO
Affected versionversion=23.4-EVO <23.4R2-S5-EVO
Affected versionversion=24.2-EVO <24.2R2-S1-EVO
Affected versionversion=24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO

What conditions does exploitation require?

Attack vectoradjacent

Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <22.2R3-S7-EVO; version=22.4-EVO <22.4R3-S7-EVO; version=23.2-EVO <23.2R2-S4-EVO; version=23.4-EVO <23.4R2-S5-EVO; version=24.2-EVO <24.2R2-S1-EVO; version=24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO

Juniper Networks · Junos OSversion=0 <21.4R3-S11; version=22.2 <22.2R3-S7; version=22.4 <22.4R3-S7; version=23.2 <23.2R2-S4; version=23.4 <23.4R2-S5; version=24.2 <24.2R2-S1; version=24.4 <24.4R1-S3, 24.4R2

Published CVSS scores

7.1Juniper NetworksCVSS: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:M/U:Amber

6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/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-130Improper Handling of Length Parameter Inconsistency

T1499.004Application or System Exploitation DoS

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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