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CVE-2026-57023 is a high severity vulnerability with a CVSS score of 7.5. No known exploits currently, and patches are available.
Very low probability of exploitation
EPSS predicts the probability of exploitation in the next 30 days based on real-world threat data, complementing CVSS severity scores with actual risk assessment.
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:
This issue does not affect releases before 23.4R1.
| Vendor | Product |
|---|---|
| Juniper | Mx240 |
| Juniper |
Please cite this page when referencing data from Strobes VI. Proper attribution helps support our vulnerability intelligence research.
| Junos |
| Juniper | Srx345 |
| Juniper | Srx4200 |
| Juniper | Srx1500 |
| Juniper | Srx2300 |
| Juniper | Srx300 |
| Juniper | Srx4300 |
| Juniper | Srx320 |
| Juniper | Srx4100 |
And 14 more...