01 Record
CVE-2024-21591
Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution
CriticalPUBLISHEDCNA: juniper
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
02 Description
Junos OS: SRX Series and EX Series: Security Vulnerability in J-web allows a preAuth Remote Code Execution
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 ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 17.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 97.1% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- 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
- 2024-01-12 00:52Z2 YR AGO
- Last updated
- 2024-10-25 20:23Z2 YR AGO
- Reserved
- 2023-12-27
- Assigning CNA
- juniper
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-787Out-of-bounds WriteBase
- Data version
- 5.1
- Document digest
- 2a9d937c90dc84da4fb21df21f006440da884b36158e7642e3d4d67ff1728b5e
05 Affected products
VendorProductVersionsPlatforms
Juniper NetworksJunos OS0 to < 20.4R3-S9, 21.2 to < 21.2R3-S7, 21.3 to < 21.3R3-S5, 21.4 to < 21.4R3-S5, 22.1 to < 22.1R3-S4, 22.2 to < 22.2R3-S3, 22.3 to < 22.3R3-S2, 22.4 to < 22.4R2-S2, 22.4R3SRX Series, EX Series
06 References
07 Remediation
The following software releases have been updated to resolve this specific issue: Junos OS: 20.4R3-S9, 21.2R3-S7, 21.3R3-S5, 21.4R3-S5, 22.1R3-S4, 22.2R3-S3, 22.3R3-S2, 22.4R2-S2, 22.4R3, 23.2R1-S1, 23.2R2, 23.4R1, and all subsequent releases.