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Vulnerabilities

Vulnerability · CVE-2025-52953

An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker send

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

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-52953. EPSS is 0.33%. 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.

Same product and reporting

Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.33%
Remediation
Version ranges on file
Affected products
vendor Juniper Networks Junos OS Evolved 24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO

An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a valid BGP UPDATE packet to cause a BGP session reset, resulting in a Denial of Service (DoS). Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects iBGP and eBGP and both IPv4 and IPv6 are affected by this vulnerability. This issue affects Junos OS: * All versions before 21.2R3-S9, * from 21.4 before 21.4R3-S11, * from 22.2 before 22.2R3-S

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 24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO

How to fix CVE-2025-52953

  • Upgrade

    CVE-2025-52953 lists a fix boundary at 24.4R1-S3-EVO. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 24.4-EVO <24.4R1-S3-EVO · 1 other packages on the advisory

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

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-2025-52953. EPSS is 0.33%. 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 24.4-EVO <24.4R1-S3-EVO, 24.4R2-EVO 24.4-EVO <24.4R1-S3-EVO, 24.4R2-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 0.33%. 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

    An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a valid BGP UPDATE packet to cause a BGP session reset, resulting in a Denial of Service (DoS). Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue a

  2. Jul 11, 2025 · EUVD

    Updated

    An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a valid BGP UPDATE packet to cause a BGP session reset, resulting in a Denial of Service (DoS). Continuous receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue a

Sources

  • CVE.orgVulnerability recordCVE-2025-52953

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52953

    30-day exploitation probability 0.33%

    first.org
  • EUVDVulnerability recordEUVD-2025-21156

    An Expected Behavior Violation vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated adjacent attacker sending a valid BGP UPDATE packet to cause a BGP session reset, resulting in a Denial of Service (DoS).

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 19, 2026