CVE-2025-52964

Routing interruption via asserted BGP UPDATE processing

Published Jul 11, 2025 · Updated Jul 14, 2025

Reachable assertion in rpd in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to restart routing via a BGP UPDATE. rpd reaches an assertion while processing a specific UPDATE when BGP multipath uses pause-computation-during-churn, causing the daemon to crash and restart. Sustained interruption requires continuous receipt from an established BGP peer while that non-default option remains configured.

CVSS severity6.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in rpd in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to restart routing via a BGP UPDATE. rpd reaches an assertion while processing a specific UPDATE when BGP multipath uses pause-computation-during-churn, causing the daemon to crash and restart. Sustained interruption requires continuous receipt from an established BGP peer while that non-default option remains configured.

The record

CVE
CVE-2025-52964
Published
Jul 11, 2025
Updated
Jul 14, 2025
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-617, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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.

  1. Affected versionversion=0 <21.4R3-S7-EVO
  2. Affected versionversion=22.3 <22.3R3-S3-EVO
  3. Affected versionversion=22.4 <22.4R3-S5-EVO
  4. Affected versionversion=23.2 <23.2R2-EVO
  5. Affected versionversion=23.4 <23.4R2-EVO

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.4R3-S7-EVO; version=22.3 <22.3R3-S3-EVO; version=22.4 <22.4R3-S5-EVO; version=23.2 <23.2R2-EVO; version=23.4 <23.4R2-EVO
Juniper Networks · Junos OSversion=0 <21.4R3-S7; version=22.1 <22.1*; version=22.2 <22.2*; version=22.3 <22.3R3-S3; version=22.4 <22.4R3-S5; version=23.2 <23.2R2; version=23.4 <23.4R2

Published CVSS scores

6.5Juniper NetworksCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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

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.

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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
T1499.004Application or System Exploitation

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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