Description
An Out-of-bounds Write vulnerability in the SNMP daemon (snmpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker sending specific valid SNMPv3 queries to trigger a memory leak. Over time, continuous receipt of these queries will result in snmpd process memory exhaustion, resulting in a process crash and restart, impacting the ability to monitor the system via SNMP.
Memory usage can be monitored using the following command:
user@device> show system processes extensive | match snmpd
This issue affects:
Junos OS:
* all versions before 21.2R3-S8; * from 21.4 before 21.4R3-S7; * from 22.1 before 22.1R3-S6; * from 22.2 before 22.2R3-S4; * from 22.3 before 22.3R3-S3; * from 22.4 before 22.4R3-S2; * from 23.2 before 23.2R2; * from 23.4 before 23.4R2.
Junos OS Evolved: * all versions before 21.2R3-S8-EVO; * from 21.4 before 21.4R3-S7-EVO; * all versions of 22.1-EVO, * from 22.2 before 22.2R3-S4-EVO; * from 22.3 before 22.3R3-S3-EVO; * all versions of 22.4-EVO, * from 23.2 before 23.2R2-EVO; * from 23.4 before 23.4R2-EVO.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:LWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Junos OS | < 21.2R3-S8; >= 21.4, < 21.4R3-S7; >= 22.1, < 22.1R3-S6; >= 22.2, < 22.2R3-S4; >= 22.3, < 22.3R3-S3; >= 22.4, < 22.4R3-S2; >= 23.2, < 23.2R2; >= 23.4, < 23.4R2 |
| Juniper Networks | Junos OS Evolved | < 21.2R3-S8-EVO; >= 21.4, < 21.4R3-S7-EVO; >= 22.1, < 22.1*; >= 22.2, < 22.2R3-S4-EVO; >= 22.3, < 22.3R3-S3-EVO; >= 22.4, < 22.4*; >= 23.2, < 23.2R2-EVO; >= 23.4, < 23.4R2-EVO |
References
- https://supportportal.juniper.net/JSA110074Mitigation, Vendor Advisory
Timeline
- Published
- Jul 9, 2026
- Last modified
- Jul 13, 2026
- NVD status
- Analyzed