Medium severity6.5NVD Advisory· Published Jan 9, 2025· Updated Jun 17, 2026

CVE-2025-21600

Description

An Out-of-Bounds Read vulnerability in

the routing protocol daemon (rpd) of

Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer sending a specifically malformed BGP packet to cause rpd to crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

This issue only affects systems configured in either of two ways:

systems with BGP traceoptions enabled

* systems with BGP family traffic-engineering (BGP-LS) configured

and can be exploited from a directly connected and configured BGP peer.

This issue affects iBGP and eBGP

with

any address family

configured, and both IPv4 and IPv6 are affected by this vulnerability.

This issue affects:

Junos OS:

from 21.4 before 21.4R3-S9, * from 22.2 before 22.2R3-S5, * from 22.3 before 22.3R3-S4, * from 22.4 before 22.4R3-S5, * from 23.2 before 23.2R2-S3, * from 23.4 before 23.4R2-S3, * from 24.2 before 24.2R1-S2, 24.2R2;

Junos OS Evolved:

from 21.4-EVO before 21.4R3-S9-EVO,
from 22.2-EVO before 22.2R3-S5-EVO,
from 22.3-EVO before 22.3R3-S4-EVO,
from 22.4-EVO before 22.4R3-S5-EVO,
from 23.2-EVO before 23.2R2-S3-EVO,
from 23.4-EVO before 23.4R2-S2-EVO,
from 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO.

This issue does not affect versions of Junos OS prior to 21.3R1.

This issue does not affect versions of Junos OS Evolved prior to 21.3R1-EVO.

This is a similar, but different vulnerability than the issue reported as CVE-2024-39516.

Affected products

139

Juniper Networks/Junos70 versions
cpe:2.3:o:juniper:junos:21.4:-:*:*:*:*:*:*+ 69 more
- cpe:2.3:o:juniper:junos:21.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s6:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s7:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3-s8:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:21.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.2:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.3:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:22.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:24.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:24.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos:24.2:r2:*:*:*:*:*:*
- (no CPE)range: 21.4 before 21.4R3-S9, 22.2 before 22.2R3-S5, 22.3 before 22.3R3-S4, 22.4 before 22.4R3-S5, 23.2 before 23.2R2-S3, 23.4 before 23.4R2-S3, 24.2 before 24.2R1-S2, 24.2R2
Juniper Networks/OS Evolved69 versions
cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*+ 68 more
- cpe:2.3:o:juniper:junos_os_evolved:21.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s5:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s6:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s7:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3-s8:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:21.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.2:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.3:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r3-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r3-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r3-s3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r3-s4:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:22.4:r3:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r2-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.2:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1-s2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r2-s1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:23.4:r2:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:24.2:-:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:24.2:r1:*:*:*:*:*:*
- cpe:2.3:o:juniper:junos_os_evolved:24.2:r2:*:*:*:*:*:*
- (no CPE)range: 21.4-EVO before 21.4R3-S9-EVO, 22.2-EVO before 22.2R3-S5-EVO, 22.3-EVO before 22.3R3-S4-EVO, 22.4-EVO before 22.4R3-S5-EVO, 23.2-EVO before 23.2R2-S3-EVO, 23.4-EVO before 23.4R2-S2-EVO, 24.2-EVO before 24.2R1-S2-EVO, 24.2R2-EVO
- (no CPE)range: 21.4-EVO

Patches

Vulnerability mechanics

References

supportportal.juniper.net/JSA92870nvdVendor Advisory

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.5/ 10

CVSS v47.1

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:C/RE:M/U:Green

Attack vector: Adjacent
Complexity: Low
Privileges: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

Probability of exploitation in the next 30 days.

0.24%

VYPR risk score

Composite of severity, exploitation, and reach.

0.42medium

cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-125
Out-of-bounds Read

CVE ID

CVE-2025-21600

Credits

JS
Juniper SIRT would like to acknowledge and thank Craig Dods from Meta’s Infrastructure Security Engineering team for responsibly reporting this vulnerability.
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