Is It On KEV?

Juniper Junos OS

YES - ON THE CISA KEV LIST
CVE-2023-36851

Juniper Junos OS SRX Series Missing Authentication for Critical Function Vulnerability

CISA catalog due date2023-11-17
overdue since 2023-11-17
EPSS exploit probability (next 30 days)1.1% · 67percentile
From CVE publication to KEV listing48 days (2023-09-26 → 2023-11-13)
Remediation window (KEV listing to due date)4 days
Days on the KEV list1094 days
Date added to KEV2023-11-13
Known ransomware campaign useUnknown
VendorJuniper
ProductJunos OS
Weaknesses (CWE)CWE-306

Juniper: 8 entries (0.4% of all KEV entries are from this vendor); 0 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauth_operation.php that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities.

Required action (CISA)

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US ; https://nvd.nist.gov/vuln/detail/CVE-2023-36851

References

Other KEV entries for this vendor: Juniper

Juniper - Vendors with KEV entries

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