CVE-2026-33799Medium· 4.3▾ SunlitAn 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, c…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.7 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
0.2% → 0.4%
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:
Junos OS Evolved:
junos < 21.2junos = 21.2junos = 21.4junos = 22.1junos = 22.2junos = 22.3junos = 22.4junos = 23.2junos = 23.4junos_os_evolved < 21.2junos_os_evolved = 21.2junos_os_evolved = 21.4junos_os_evolved = 22.1junos_os_evolved = 22.2junos_os_evolved = 22.3junos_os_evolved = 22.4junos_os_evolved = 23.2junos_os_evolved = 23.4Upgrade past the affected range:
junos 21.2junos_os_evolved 21.2Connected by shared product, vendor, weakness, or advisory.
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