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CVE-2024-21610

16
FAUCET Score

CVE-2024-21610 is an Improper Handling of Exceptional Conditions vulnerability in the Class of Service daemon (cosd) of Juniper Networks Junos OS, affecting numerous versions across multiple releases. An authenticated, low-privileged network attacker can exploit this to cause a limited Denial of Service (DoS) by making child management daemon (mgd) processes become stuck, particularly in scaled CoS scenarios. This Medium severity vulnerability (CVSS 4.3) has a low attack complexity and impacts availability, but there is no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 20.4R3-S9CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 21.2, < 21.2R3-S7CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 21.3, < 21.3R3-S5CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 21.4, < 21.4R3-S5CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
>= 22.1, < 22.1R3-S4CPE match
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.3MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/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:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 48th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

first.org / cvss/calculator/4.0
Not Applicable
supportportal.juniper.net / JSA75751
Vendor Advisory