CVE-2025-30646: Junos OS and Junos OS Evolved: Receipt of a malformed LLDP TLV results in l2cpd crash
Juniper Networks · Junos OS
Vendor fix available · Affected: Juniper Networks Junos OS · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 16% of scored CVEs
DescriptionCVE.org
A Signed to Unsigned Conversion Error vulnerability in the Layer 2 Control Protocol daemon (l2cpd) of Juniper Networks Junos OS and Juniper Networks Junos OS Evolved allows an unauthenticated adjacent attacker sending a specifically malformed LLDP TLV to cause the l2cpd process to crash and restart, causing a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. When an LLDP telemetry subscription is active, receipt of a specifically malformed LLDP TLV causes the l2cpd process to crash and restart. This issue affects: Junos OS: * All versions before 21.2R3-S9, * from 21.4 before 21.4R3-S10, * from 22.2 before 22.2R3-S6, * from 22.4 before 22.4R3-S6, * from 23.2 before 23.2R2-S3, * from 23.4 before 23.4R2-S4, * from 24.2 before 24.2R2; Junos OS Evolved: * All versions before 21.4R3-S10-EVO, * from 22.2-EVO before 22.2R3-S6-EVO, * from 22.4-EVO before 22.4R3-S6-EVO, * from 23.2-EVO before 23.2R2-S3-EVO, * from 23.4-EVO before 23.4R2-S4-EVO, * from 24.2-EVO before 24.2R2-EVO.
Affected products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Juniper Networks · Junos OSbefore 21.2R3-S9; from 21.4 before 21.4R3-S10; from 22.2 before 22.2R3-S6; from 22.4 before 22.4R3-S6; from 23.2 before 23.2R2-S3; from 23.4 before 23.4R2-S4 and 1 more
- Juniper Networks · Junos OS Evolvedbefore 21.4R3-S10-EVO; from 22.2-EVO before 22.2R3-S6-EVO; from 22.4-EVO before 22.4R3-S6-EVO; from 23.2-EVO before 23.2R2-S3-EVO; from 23.4-EVO before 23.4R2-S4-EVO; from 24.2-EVO before 24.2R2-EVO
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Juniper Networks
- Published
- April 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-30646 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.