Full Report
Juniper Networks security advisory (AV26-334)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Juniper Networks Products (April 2026 Batch)
## CVE Details
*Note: The primary source document (AV26-334) acts as a consolidated bulletin. Individual CVE IDs for this specific batch are detailed in the individual Juniper advisories linked within their support portal.*
- **CVE ID:** Multiple (Refer to Juniper Support Portal for specific IDs)
- **CVSS Score:** Range typically 7.5 to 9.8 (Estimated based on product impact)
- **Severity:** High / Critical
- **CWE:** Often includes CWE-20 (Improper Input Validation) and CWE-400 (Uncontrolled Resource Consumption) in these product lines.
## Affected Systems
- **Products:**
- Apstra
- JSI vLWC
- Junos OS (SRX and MX Series)
- Junos OS Evolved
- **Versions:**
- **Apstra:** Versions prior to 6.1.1
- **JSI vLWC:** Versions prior to 3.0.94
- **Junos OS (SRX/MX):** 21.2, 21.3, 21.4, 22.1, 22.2, 22.4, 23.2, 23.4, 24.2, 24.4, 25.2 (Specific minor versions listed in remediation)
- **Junos OS Evolved:** 21.2 through 25.2 (Specific minor versions listed in remediation)
- **Configurations:** Systems running affected Junos OS versions with routing or management interfaces exposed to untrusted traffic.
## Vulnerability Description
While the bulletin is a collection of updates, the flaws typically involve specialized processing of network packets or management API calls. These vulnerabilities in Junos OS and Junos OS Evolved often relate to how the Routing Engine (RE) or Packet Forwarding Engine (PFE) handles specific intensities or types of traffic, potentially leading to unauthorized access, remote code execution, or sustained Denial of Service (DoS).
## Exploitation
- **Status:** Not exploited (No widespread "in-the-wild" exploitation reported at time of release; verification required per individual CVE).
- **Complexity:** Low to Medium
- **Attack Vector:** Network
## Impact
- **Confidentiality:** High (Potential for unauthorized data access)
- **Integrity:** High (Potential for configuration manipulation)
- **Availability:** High (Potential for system crash or service bypass)
## Remediation
### Patches
Juniper Networks recommends upgrading to the following versions or later:
- **Apstra:** 6.1.1
- **JSI vLWC:** 3.0.94
- **Junos (SRX/MX):** 21.2R3-S10, 21.4R3-S12, 22.2R3-S8, 22.4R3-S9, 23.2R2-S6, 23.4R2-S7, 24.2R2-S3, 25.2R1-S2.
- **Junos OS Evolved:** 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-S4-EVO, 23.4R2-S8-EVO, 24.2R2-S4-EVO, 24.4R2-S3-EVO, 25.2R2-EVO.
### Workarounds
- **Filter Management Access:** Restrict SSH, HTTP/HTTPS, and SNMP access to trusted management networks only via firewall filters (ACLs).
- **Disable Unused Services:** Disable any unnecessary services (e.g., J-Web) if not strictly required for operations.
## Detection
- **Indicators of Compromise:** Monitor logs for unexpected "rpd" (Routing Protocol Daemon) restarts, unusual memory utilization, or unauthorized administrative logins.
- **Detection Methods:** Utilize Juniper-specific SNMP MIBs to monitor system stability and compare current running versions against the fixed versions list provided by the vendor.
## References
- **Vendor Advisory:** hxxps[://]supportportal[.]juniper[.]net/s/global-search/%40uri#sort=relevancy&f:ctype=[Security%20Advisories]
- **CCCS Bulletin:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/juniper-networks-security-advisory-av26-334