01 Record
CVE-2026-57023
Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash
HighPUBLISHEDCNA: juniper
CNA base score8.7 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M
02 Description
Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd crash
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.46% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 39.6% of scored records. A rank, not a probability.
- NVD base score
- 8.7 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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:Y/R:A/V:X/RE:M/U:X
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-10-25.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-07-09 21:06Z3 MO AGO
- Last updated
- 2026-07-10 15:28Z3 MO AGO
- Reserved
- 2026-06-23
- Assigning CNA
- juniper
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.7)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/RE:M
- Weaknesses
- CWE-1284Improper Validation of Specified Quantity in InputBase
- Data version
- 5.2
- Document digest
- 9ae569d6f833b5249f57bafb00ba5e6165d415bebb796d11df6b6feddc7d846f
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS23.4 to < 23.4R2-S7, 24.2 to < 24.2R2-S4, 24.4 to < 24.4R2-S3, 25.2 to < 25.2R2SRX Series, MX Series with SPC3
06 References
- supportportal.juniper.nethttps://supportportal.juniper.net/JSA110083
07 Remediation
The following software releases have been updated to resolve this specific issue: 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R2, 25.4R1, and all subsequent releases.