Riskcovery

CVE-2025-60011

Junos OS and Junos OS Evolved: Optional transitive BGP attribute is modified before propagation to peers causing sessions to flap

State
Published
Severity
6.9 Medium
Published
Jan 15, 2026
Updated
Jan 15, 2026
Reserved
Sep 23, 2025

Read the record on cve.org

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network-based attacker to cause an availability impact for downstream devices.

When an affected device receives a specific optional, transitive BGP attribute over an existing BGP session, it will be erroneously modified before propagation to peers. When the attribute is detected as malformed by the peers, these peers will most likely terminate the BGP sessions with the affected devices and thereby cause an availability impact due to the resulting routing churn.

This issue affects:

Junos OS:

* all versions before 22.4R3-S8, * 23.2 versions before 23.2R2-S5 * 23.4 versions before 23.4R2-S6, * 24.2 versions before 24.2R2-S2, * 24.4 versions before 24.4R2;

Junos OS Evolved:

* all versions before 22.4R3-S8-EVO, * 23.2 versions before 23.2R2-S5-EVO, * 23.4 versions before 23.4R2-S6-EVO, * 24.2 versions before 24.2R2-S2-EVO, * 24.4 versions before 24.4R2-EVO.

Scores

CVSSScoreVectorSource
4.06.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L/AU:Y/R:U/RE:Mjuniper
3.15.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Ljuniper

Weaknesses

  • CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 22.4R3-S8Affected
  • 23.2 to before 23.2R2-S5Affected
  • 23.4 to before 23.4R2-S6Affected
  • 24.2 to before 24.2R2-S2Affected
  • 24.4 to before 24.4R2Affected
Junos OS EvolvedJuniper Networks
  • before 22.4R3-S8-EVOAffected
  • 23.2 to before 23.2R2-S5-EVOAffected
  • 23.4 to before 23.4R2-S6-EVOAffected
  • 24.2 to before 24.2R2-S2-EVOAffected
  • 24.4 to before 24.4R2-EVOAffected

References

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