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CVE-2026-57025— Junos OS and Junos OS Evolved: EX Series, QFX Series, MX Series: A specific 'show l2-learning' command causes l2ald crash

CVSS 5.5 · Medium EPSS 0.14% · P4

Affected Version Matrix 8

VendorProductVersion RangeStatus
Juniper NetworksJunos OS< 23.2R2-S7affected
23.4< 23.4R2-S7affected
24.2< 24.2R2affected
24.4< 24.4R1-S2affected
Juniper NetworksJunos OS Evolved< 23.2R2-S7-EVOaffected
23.4< 23.4R2-S8-EVOaffected
24.2< 24.2R2-EVOaffected
24.4< 24.4R1-S3-EVOaffected
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I. Basic Information for CVE-2026-57025

Vulnerability Information
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Vulnerability Title
Junos OS and Junos OS Evolved: EX Series, QFX Series, MX Series: A specific 'show l2-learning' command causes l2ald crash
Source: NVD (National Vulnerability Database)
Vulnerability Description
A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS). On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted. This issue affects EX Series, QFX Series, MX Series: Junos OS: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S7, * 24.2 versions before 24.2R2, * 24.4 versions before 24.4R1-S2. Junos OS Evolved: * all versions before 23.2R2-S7-EVO, * 23.4 versions before 23.4R2-S8-EVO, * 24.2 versions before 24.2R2-EVO, * 24.4 versions before 24.4R1-S3-EVO.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
在预期范围外返回指针值
Source: NVD (National Vulnerability Database)
Vulnerability Title
Juniper Networks Junos OS 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Juniper Networks Junos OS是美国Juniper Networks公司的一款专为路由器、交换机和防火墙等物理及虚拟设备打造的网络操作系统。 Juniper Networks Junos OS存在缓冲区错误漏洞，该漏洞源于fileio库存在指针值返回超出预期范围的问题，可能导致本地低权限攻击者造成拒绝服务。以下版本受到影响： Juniper Networks Junos OS：23.2R2-S7之前版本、23.4版本且23.4R2-S7之前版本、24.2版本且24.2R2之前版本、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

VendorProductAffected VersionsCPESubscribe
Juniper NetworksJunos OS 0 ~ 23.2R2-S7 -
Juniper NetworksJunos OS Evolved 0 ~ 23.2R2-S7-EVO -

II. Public POCs for CVE-2026-57025

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III. Intelligence Information for CVE-2026-57025

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Vendor Advisories for CVE-2026-57025 (1)

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

CVE-2026-570267.5 HIGHJunos OS: MX Series with SPC3, SRX Series: Processing of a specifically malformed SIP invi
CVE-2026-570237.5 HIGHJunos OS: MX with SPC3, SRX Series: A specifically malformed TCP packet causes a flowd cra
CVE-2026-570287.3 HIGHJunos OS Evolved: A port which has been inadvertently exposed can be reached by an attacke
CVE-2026-570326.5 MEDIUMJunos OS: EX Series: Subscribing to an unsupported telemetry sensor path causes fxpc proce
CVE-2026-338006.5 MEDIUMJunos OS: MX Series: In a VC scenario a high rate of micro-BFD session flaps will cause an
CVE-2026-338016.5 MEDIUMJunos OS and Junos OS Evolved: When a specifically malformed BGP route update is received
CVE-2026-570276.5 MEDIUMJunos OS: EX4100 Series, EX4400: With sFlow configured in a VC scenario multicast traffic
CVE-2026-338036.5 MEDIUMJunos OS Evolved: A port which has been inadvertently exposed can be reached by an attacke
CVE-2026-570196.5 MEDIUMJunos OS: MX Series: Specific traffic causes an FPC to reset
CVE-2026-570206.5 MEDIUMJunos OS: QFX10000 Series: IPv6 multicast traffic received on non-IRB interfaces causes a
CVE-2026-570225.9 MEDIUMJunos OS: MX Series with SPC3, SRX Series: Specific packet in response to a TCP connection
CVE-2026-337945.9 MEDIUMJunos OS Evolved: PTX Series: Receipt of repeated ECMP routing updates results in PFE cras
CVE-2026-570305.9 MEDIUMJunos OS: SRX Series: Flow sessions are not getting cleared leading to a DoS
CVE-2026-570545.8 MEDIUMJunos OS: MX Series: Web filtering doesn't block specifically formatted URLs
CVE-2026-338025.5 MEDIUMJunos OS: EX Series: Unauthorized users can execute service-impacting CLI command
CVE-2026-570215.3 MEDIUMJunos OS: SRX Series: If VPN compliance-check is configured an attacker can cause http-gk
CVE-2026-570245.3 MEDIUMJunos OS: MX with SPC3, SRX Series: Repeated VPN negotiation failures will eventually caus
CVE-2026-570295.3 MEDIUMJunos OS Evolved: QFX Series: When sFlow collector reachability changes evo-pfemand proces
CVE-2026-570314.7 MEDIUMJunos OS: MX Series: For subscribers configured on static interfaces, input filters are no
CVE-2026-219014.4 MEDIUMJunos 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
Same vendor: Juniper Networks
Same weakness: CWE-466

V. Comments for CVE-2026-57025

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