CVE-2026-102047
Medium
Description
An Improper Validation of Consistency within Input vulnerability in the l2cpd process of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated Layer 2 attacker to cause a denial of service in associated Layer 2 control protocols via a crafted MVRP Ethernet frame sent to an MVRP-enabled interface.
SeverityMedium
CVSS6.5
Exploit probability—
ProductJunos OS
PublishedOct 14, 2026
First seenOct 14, 2026
Weakness typeCWE-1288CWE-1288
How to fix
Update
- Juniper Networks Junos OS23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 26.2R1-S2 or later
- Juniper Networks Junos OS Evolved23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.4R1-S3-EVO, 26.2R1-S2-EVO, 25.2X100-D35-EVO, 25.4X300-D40-EVO or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Juniper Networks Junos OS | v < 23.2R2-S7.7, 23.4 ≤ v < 23.4R2-S8.13, 24.2 ≤ v < 24.2R2-S5.5, 24.4 ≤ v < 24.4R2-S5, 25.2 ≤ v < 25.2R2-S2, 25.4 ≤ v < 25.4R1-S3, 26.2 ≤ v < 26.2R1-S2 | 23.2R2-S7.7, 23.4R2-S8.13, 24.2R2-S5.5, 24.4R2-S5, 25.2R2-S2, 25.4R1-S3, 26.2R1-S2 |
| Juniper Networks Junos OS Evolved | v < 23.2R2-S7.7-EVO, 23.4 ≤ v < 23.4R2-S8.11-EVO, 24.2 ≤ v < 24.2R2-S5.6-EVO, 24.4 ≤ v < 24.4R2-S5-EVO, 25.2 ≤ v < 25.2R2-S2-EVO, 25.4 ≤ v < 25.4R1-S3-EVO, 26.2 ≤ v < 26.2R1-S2-EVO, 23.4X100, 25.2X100 ≤ v < 25.2X100-D35-EVO, 25.4X300 ≤ v < 25.4X300-D40-EVO | 23.2R2-S7.7-EVO, 23.4R2-S8.11-EVO, 24.2R2-S5.6-EVO, 24.4R2-S5-EVO, 25.2R2-S2-EVO, 25.4R1-S3-EVO, 26.2R1-S2-EVO, 25.2X100-D35-EVO, 25.4X300-D40-EVO |
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