Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-57029— Junos OS Evolved: QFX Series: When sFlow collector reachability changes evo-pfemand process can crash

Quick assessment

Affected
Juniper Networks Junos OS Evolved
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 Evolved是美国Juniper Networks公司的一款网络设备操作系统。 Juniper Networks Junos OS Evolved存在竞争条件问题漏洞，该漏洞源于流收集器处理程序缺少同步机制，当sFlow收集器的可达性变化导致下一跳条目更新与sFlow线程同时访问下一跳数据时，可能导致evo-pfemand进程崩溃，影响所有流量转发直到自动重启完成。以下版本受到影响：所有23.2版本、23.4R2-S7-EVO之前的23.4版本、24.

CVSS 5.3 · Medium EPSS 0.19% · P8

Affected Version Matrix 4

VendorProduct Version RangeStatus
Juniper Networks Junos OS Evolved < 23.4R2-S7-EVO affected
24.2< 24.2R2-S5-EVO affected
24.4< 24.4R2-S3-EVO affected
25.2< 25.2R2-EVO affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-57029

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Junos OS Evolved: QFX Series: When sFlow collector reachability changes evo-pfemand process can crash
Source: CVE Program / CVE List V5
Vulnerability Description
A Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on QFX Series allows an adjacent, unauthenticated attacker to cause a Denial-of-Service (DoS). When the reachability of an sFlow collector changes, the corresponding next-hop entry is updated. If this update occurs simultaneously with the sFlow thread accessing the next-hop data (which is outside the attackers control), it causes the evo-pfemand process to crash, impacting all traffic forwarding until the automatic process restart has completed. This issue affects Junos OS Evolved on QFX Series: * all 23.2 versions,  * 23.4 versions before 23.4R2-S7-EVO, * 24.2 versions before 24.2R2-S5-EVO, * 24.4 versions before 24.4R2-S3-EVO, * 25.2 versions before 25.2R2-EVO.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
缺失同步机制
Source: CVE Program / CVE List V5
Vulnerability Title
Juniper Networks Junos OS Evolved 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS Evolved是美国Juniper Networks公司的一款网络设备操作系统。 Juniper Networks Junos OS Evolved存在竞争条件问题漏洞，该漏洞源于流收集器处理程序缺少同步机制，当sFlow收集器的可达性变化导致下一跳条目更新与sFlow线程同时访问下一跳数据时，可能导致evo-pfemand进程崩溃，影响所有流量转发直到自动重启完成。以下版本受到影响：所有23.2版本、23.4R2-S7-EVO之前的23.4版本、24.
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 Evolved 0 ~ 23.4R2-S7-EVO -

II. Public POCs for CVE-2026-57029

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-57029

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-57029 (1)

Same Patch Batch · Juniper Networks · 2026-07-09 · 22 CVEs total

CVE-2026-57026 7.5 HIGH Junos OS: MX Series with SPC3, SRX Series: Processing of a specifically malformed SIP invi
CVE-2026-57023 7.5 HIGH Junos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd cra
CVE-2026-57028 7.3 HIGH Junos OS Evolved: A port which has been inadvertently exposed can be reached by an attacke
CVE-2026-57032 6.5 MEDIUM Junos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc proce
CVE-2026-33800 6.5 MEDIUM Junos OS: MX Series: In a VC scenario a high rate of micro-BFD session flaps will cause an
CVE-2026-57027 6.5 MEDIUM Junos OS: EX4100 Series, EX4400: With sFlow configured in a VC scenario multicast traffic
CVE-2026-33801 6.5 MEDIUM Junos OS and Junos OS Evolved: When a specifically malformed BGP route update is received
CVE-2026-33803 6.5 MEDIUM Junos OS Evolved: A port which has been inadvertently exposed can be reached by an attacke
CVE-2026-57019 6.5 MEDIUM Junos OS: MX Series: Specific traffic causes an FPC to reset
CVE-2026-57020 6.5 MEDIUM Junos OS: QFX10000 Series: IPv6 multicast traffic received on non-IRB interfaces causes a
CVE-2026-57022 5.9 MEDIUM Junos OS: MX Series with SPC3, SRX Series: Specific packet in response to a TCP connection
CVE-2026-33794 5.9 MEDIUM Junos OS Evolved: PTX Series: Receipt of repeated ECMP routing updates results in PFE cras
CVE-2026-57030 5.9 MEDIUM Junos OS: SRX Series: Flow sessions are not getting cleared leading to a DoS
CVE-2026-57054 5.8 MEDIUM Junos OS: MX Series: Web filtering doesn't block specifically formatted URLs
CVE-2026-33802 5.5 MEDIUM Junos OS: EX Series: Unauthorized users can execute service-impacting CLI command
CVE-2026-57025 5.5 MEDIUM Junos OS and Junos OS Evolved: EX Series, QFX Series, MX Series: A specific 'show l2-learn
CVE-2026-57021 5.3 MEDIUM Junos OS: SRX Series: If VPN compliance-check is configured an attacker can cause http-gk
CVE-2026-57024 5.3 MEDIUM Junos OS: MX with SPC3, SRX Series: Repeated VPN negotiation failures will eventually caus
CVE-2026-57031 4.7 MEDIUM Junos OS: MX Series: For subscribers configured on static interfaces, input filters are no
CVE-2026-21901 4.4 MEDIUM Junos OS and Junos OS Evolved: Configuration of a specific SSH option results in mgd crash

Showing top 20 of 22 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Junos OS Evolved
Same vendor: Juniper Networks
Same weakness: CWE-820

V. Comments for CVE-2026-57029

No comments yet

Leave a comment