CVE-2026-33790— Junos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 packet will cause the srxpfe process to crash and restart.
Quick assessment
Affected
Juniper Networks Junos OS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Juniper Networks Junos OS SRX是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS SRX存在代码问题漏洞，该漏洞源于对异常或特殊情况检查不当，可能导致拒绝服务攻击。以下版本受到影响：21.2R3-S10之前版本、21.3所有版本、21.4R3-S12之前版本、22.1所有版本、22.2R3-S8之前版本、22.4所有版本、22.4
Possible ATT&CK Techniques 1 AI
T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2026-33790
Vulnerability Information
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Vulnerability Title
Junos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 packet will cause the srxpfe process to crash and restart.
Source: CVE Program / CVE List V5
Vulnerability Description
An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart. Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.
During NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.
This issue cannot be triggered using IPv4 nor other IPv6 traffic.
This issue affects Junos OS on SRX Series:
* all versions before 21.2R3-S10,
* all versions of 21.3,
* from 21.4 before 21.4R3-S12,
* all versions of 22.1,
* from 22.2 before 22.2R3-S8,
* all versions of 22.4,
* from 22.4 before 22.4R3-S9,
* from 23.2 before 23.2R2-S6,
* from 23.4 before 23.4R2-S7,
* from 24.2 before 24.2R2-S3,
* from 24.4 before 24.4R2-S3,
* from 25.2 before 25.2R1-S2, 25.2R2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对因果或异常条件的不恰当检查
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS SRX 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS SRX是美国瞻博网络（Juniper Networks）公司的一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。 Juniper Networks Junos OS SRX存在代码问题漏洞，该漏洞源于对异常或特殊情况检查不当，可能导致拒绝服务攻击。以下版本受到影响：21.2R3-S10之前版本、21.3所有版本、21.4R3-S12之前版本、22.1所有版本、22.2R3-S8之前版本、22.4所有版本、22.4
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Juniper Networks | Junos OS | 0 ~ 21.2R3-S10 | - |
|
II. Public POCs for CVE-2026-33790
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-33790 (1)
Same Patch Batch · Juniper Networks · 2026-04-09 · 26 CVEs total
| CVE-2026-33784 | 9.8 CRITICAL | JSI Virtual Lightweight Collector: Default password is not required to be changed which al |
| CVE-2026-33785 | 8.8 HIGH | Junos OS: MX Series: Missing Authorization for specific 'request' CLI commands in a JDM/CS |
| CVE-2025-13914 | 8.7 HIGH | Apstra: SSH host key validation vulnerability for managed devices |
| CVE-2026-33793 | 7.8 HIGH | Junos OS and Junos OS Evolved: When an unsigned Python op script configuration is present, |
| CVE-2026-33788 | 7.8 HIGH | Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs |
| CVE-2026-33778 | 7.5 HIGH | Junos OS: SRX Series, MX Series: When a specifically malformed first ISAKMP packet is rece |
| CVE-2026-33771 | 7.4 HIGH | CTP OS: Configuring password requirements does not work which permits the use of weak pass |
| CVE-2026-33797 | 7.4 HIGH | Junos OS and Junos OS Evolved: An attacker sending a specific genuine BGP packet causes a |
| CVE-2026-21916 | 7.3 HIGH | Junos OS: A low privileged user can escalate their privileges so that they can login as ro |
| CVE-2026-21915 | 6.7 MEDIUM | JSI Virtual Lightweight Collector: Shell escape allows privilege escalation to root |
| CVE-2026-33791 | 6.7 MEDIUM | Junos OS and Junos OS Evolved: Execution of crafted CLI commands allows for arbitrary shel |
| CVE-2026-33779 | 6.5 MEDIUM | Junos OS: SRX Series: Insufficient certificate verification for device to SD cloud communi |
| CVE-2025-59969 | 6.5 MEDIUM | Junos OS Evolved: QFX5000 Series and PTX Series: An attacker sending crafted multicast pac |
| CVE-2026-21919 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: A high frequency of connecting and disconnecting NETCONF se |
| CVE-2026-33780 | 6.5 MEDIUM | Junos OS and Junos OS Evolved: In an EVPN-MPLS scenario churn of ESI routes causes a memor |
| CVE-2026-33782 | 6.5 MEDIUM | Junos OS: MX Series: In specific DHCPv6 scenarios jdhcpd memory increases continuously wit |
| CVE-2026-33775 | 6.5 MEDIUM | Junos OS: MX Series: Mismatch between configured and received packet types causes memory l |
| CVE-2026-33774 | 6.5 MEDIUM | Junos OS: MX Series: Firewall filters on lo0.<non-0> in the default routing instance are n |
| CVE-2026-33781 | 6.5 MEDIUM | Junos OS: EX Series, QFX Series: In a VXLAN scenario when specific control protocol packet |
| CVE-2026-33783 | 6.5 MEDIUM | Junos OS Evolved: PTX Series: If SRTE tunnels provisioned via PCEP are present and specifi |
Showing top 20 of 26 CVEs. View all on vendor page → →
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