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CVE-2024-39552

22
FAUCET Score

CVE-2024-39552 is an Improper Handling of Exceptional Conditions vulnerability affecting Juniper Networks Junos OS and Junos OS Evolved. It allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS) by sending a malformed BGP UPDATE packet to an established BGP session, crashing the routing protocol daemon (RPD). This vulnerability has a CVSS score of 7.5 (HIGH), indicating a low attack complexity and no user interaction required, leading to a high impact on availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 20.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*
20.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:20.4:-:*:*:*:*:*:*
20.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:20.4:r1:*:*:*:*:*:*
20.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:20.4:r1-s1:*:*:*:*:*:*
20.4CPE matchmatch criteria
cpe:2.3:o:juniper:junos:20.4:r2:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

8.7HIGH

CVSS:4.0/AV:N/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:X/R:A/V:X/RE:X/U:X

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

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 22nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

supportportal.juniper.net / JSA75726
Vendor Advisory