CVE-2026-57028: An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos

Q: How do I fix CVE-2026-57028?

junos os evolved: upgrade to 23.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-57028 being exploited?

CVE-2026-57028 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-57028 affect?

CVE-2026-57028 affects junos os evolved. Severity is high (CVSS 7.3). An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause license exhaustion. Due to an incorrect initialization, a

Q: How urgent is CVE-2026-57028?

Priority 36/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.3REMOTEUPGRADE

CVE-2026-57028 is a high-severity flaw (CVSS 7.3) affecting junos os evolved. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause license exhaustion. Due to an incorrect initialization, a process which should only be able to communicate internally within the device, can be reached over the network via an open port. This leads to unauthorized access to the license management. This issue affects

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-923
Published	2026-07-09
Last modified	2026-10-25

Publisher (CNA): Juniper Networks, Inc. · Vendor: juniper

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-09 22:17 UTCPublished CVE record published
2026-10-25 15:10 UTCUpdated Record last modified

juniper junos os evolved UPGRADE

Affected: < 23.2 · 23.2 · 23.2 r1 · 23.2 r1-s1 · 23.2 r1-s2

Fixed in: 23.2

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-57028?

junos os evolved: upgrade to 23.2. Exact commands for each OS are on this page.

Is CVE-2026-57028 being exploited?

CVE-2026-57028 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-57028 affect?

CVE-2026-57028 affects junos os evolved. Severity is high (CVSS 7.3). An Improper Restriction of Communication Channel to Intended Endpoints vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause license exhaustion. Due to an incorrect initialization, a

How urgent is CVE-2026-57028?

Priority 36/100. High severity; Remotely exploitable, no login, no user action

Software pages

Juniper Junos vulnerabilities

Related CVEs

CVE-2026-57029 MEDIUM 5.3 MITIGATE A Missing Synchronization vulnerability in the flow collector handler of Juniper Networks Junos OS Evolved on

References

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