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CVE-2019-0048

19
FAUCET Score

CVE-2019-0048 is a medium-severity vulnerability affecting Juniper EX4300 Series switches with TCAM optimization enabled, where an implicit loopback filter rule incorrectly matches multicast traffic, potentially causing other firewall filters to fail. The vulnerability has a CVSS score of 5.8, indicating a network-based attack with low complexity, resulting in a potential impact of low integrity and no confidentiality or availability compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
14.1x53CPE matchmatch criteria
cpe:2.3:o:juniper:junos:14.1x53:-:*:*:*:*:*:*
14.1x53CPE matchmatch criteria
cpe:2.3:o:juniper:junos:14.1x53:d10:*:*:*:*:*:*
14.1x53CPE matchmatch criteria
cpe:2.3:o:juniper:junos:14.1x53:d15:*:*:*:*:*:*
14.1x53CPE matchmatch criteria
cpe:2.3:o:juniper:junos:14.1x53:d16:*:*:*:*:*:*
14.1x53CPE matchmatch criteria
cpe:2.3:o:juniper:junos:14.1x53:d25:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.8MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.97%
Probability of exploitation in next 30 days
EPSS Percentile
58.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0097 is in the 36th percentile among its peer group of 23,723 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

juniperpatch availablevia nvd_reference
View patch

References

kb.juniper.net / JSA10942
PatchVendor Advisory