CVE-2026-57023
HIGHDescription
An Improper Validation of Specified Quantity in Input vulnerability in the TCP proxy plugin of Juniper Networks Junos OS on MX Series with SPC3, and SRX Series allows an unauthenticated, network-based attacker to cause a complete Denial of Service (DoS). When TCP proxy is engaged in a flow session, to support ALGs, Advanced Anti-Malware, ICAP or UTM, a TCP packet with specifically malformed TCP header will cause flow processing daemon (flowd) to crash and restart. This causes a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX with SPC3, and SRX Series: * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2-S4, * 24.4 versions before 24.4R2-S3, * 25.2 versions before 25.2R2. This issue does not affect releases before 23.4R1.
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CVSS v3.1 Score
EPSS — Exploit Prediction
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
Weakness Type (CWE)
Affected Products
| Vendor | Product |
|---|---|
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | junos |
| juniper | mx-spc3 |
| juniper | mx240 |
| juniper | mx480 |
| juniper | mx960 |
| juniper | srx1500 |
| juniper | srx1600 |
| juniper | srx2300 |
| juniper | srx300 |
| juniper | srx320 |
| juniper | srx340 |
| juniper | srx345 |
| juniper | srx380 |
| juniper | srx400 |
| juniper | srx4100 |
| juniper | srx4120 |
| juniper | srx4200 |
| juniper | srx4300 |
| juniper | srx440 |
| juniper | srx4600 |
| juniper | srx4700 |
| juniper | srx5400 |
| juniper | srx5600 |
| juniper | srx5800 |
References
Advisories & Patches
Frequently Asked Questions
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