Description
A Missing Authentication for Critical Function vulnerability in command processing of Juniper Networks Junos OS allows a privileged local attacker to gain access to Linux-based line cards as root. This issue affects systems running Junos OS using Linux-based line cards. Affected line cards include: * MPC7, MPC8, MPC9, MPC10, MPC11 * LC2101, LC2103 * LC480, LC4800, LC9600 * MX304 (built-in FPC) * MX-SPC3 * SRX5K-SPC3 * EX9200-40XS * FPC3-PTX-U2, FPC3-PTX-U3 * FPC3-SFF-PTX * LC1101, LC1102, LC1104, LC1105 This issue affects Junos OS: * all versions before 22.4R3-S8, * from 23.2 before 23.2R2-S6, * from 23.4 before 23.4R2-S6, * from 24.2 before 24.2R2-S3, * from 24.4 before 24.4R2, * from 25.2 before 25.2R2.
Affected products
juniper: junos; juniper: ex9200; juniper: fpc3-ptx-u2; juniper: fpc3-ptx-u3; juniper: fpc3-sff-ptx; juniper: lc1101; juniper: lc1102; juniper: lc1104; juniper: lc1105; juniper: lc2101; juniper: lc2103; juniper: lc480; juniper: lc4800; juniper: lc9600; juniper: mpc10
References2
- kb.juniper.net/JSA107863 Vendor Advisory
- github.com/orangecertcc/security-research/security/advisories/G… Third Party Advisory
Metrics
- CVSS 3.1
-
6.7
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS 4.0
-
8.4
HIGH
Score source: CNA
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:C/RE:M/U:Amber - EPSS — exploit probability
- 0% percentile: 3 · as of 12 November 2026
- CWE
- CWE-306
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