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Vulnerabilities

Vulnerability · CVE-2025-52958

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a D

Published Jul 11, 2025 · catalog updated Jul 11, 2025 · Juniper Networks Junos OS Evolved

Check if you run it

No confirmed exploitation is on record for CVE-2025-52958. EPSS is 0.25%. Act only if a listed version of Juniper Networks Junos OS Evolved is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Version ranges on file
Affected products
vendor Juniper Networks Junos OS Evolved 23.2 <23.2R2-S3-EVO

A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during BGP initial session establishment can lead to an rpd crash and restart. This occurs specifically when the connection request fails during error-handling scenario. Continued session establishment failures leads to a sustained DoS condition. This issue affects Junos OS: * All versions before 22

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Juniper Networks Junos OS Evolved 23.2 <23.2R2-S3-EVO23.2 <23.2R2-S3-EVO

How to fix CVE-2025-52958

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-52958. EPSS is 0.25%. Act only if a listed version of Juniper Networks Junos OS Evolved is installed.

Which versions are affected?

Compare what you have installed with Juniper Networks Junos OS Evolved 23.2 <23.2R2-S3-EVO 23.2 <23.2R2-S3-EVO. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 11, 2025 · EUVD

    Detected

    A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during BGP initial session establishment can lead to an rpd crash and restart. This occurs specifica

  2. Jul 11, 2025 · EUVD

    Updated

    A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enabled, a rare condition during BGP initial session establishment can lead to an rpd crash and restart. This occurs specifica

Sources

  • CVE.orgVulnerability recordCVE-2025-52958

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52958

    30-day exploitation probability 0.25%

    first.org
  • EUVDVulnerability recordEUVD-2025-21162

    A Reachable Assertion vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).On all Junos OS and Junos OS Evolved devices, when route validation is enable

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.