Is CVE-2026-57026 in the CISA KEV catalog?

No. CVE-2026-57026 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-57026?

CVE-2026-57026 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-57026?

CVE-2026-57026 has an EPSS score of 0.46% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-57026?

Upgrade junos to 23.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-57026

HIGH

7.5

CVSS v3

NVD

Description

An Improper Validation of Syntactic Correctness of Input vulnerability in the SIP plugin of Juniper Networks Junos OS on MX Series with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).If the SIP ALG is enabled on an affected device, the processing of a malformed SIP invite packet will cause a flow processing daemon (flowd) crash and restart. This leads to a complete service outage until the system has automatically recovered. This issue affects Junos OS on MX Series with SPC3 and SRX Series: * all versions before 23.2R2-S7, * 23.4 versions before 23.4R2-S8, * 24.2 versions before 24.2R2-S5, * 24.4 versions before 24.4R2-S4, * 25.2 versions before 25.2R2, * 25.4 versions before 25.4R1-S2.

CWE-1286

How to fix

Remediation Available

junosNVD

Affected:< 23.2Fixed in:23.2CVE-2026-57026derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.46%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory1

supportportal.juniper.net

Related Vulnerabilities

Other CWE-1286 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-7954	Critical	9.8	90%	-	Fix
CVE-2025-13878	High	7.5	8.2%	-	Fix
CVE-2024-51983	High	7.5	7.8%	-	-
CVE-2026-21527	High	6.5	7.7%	-	Fix
CVE-2024-51982	High	7.5	7.1%	-	-
CVE-2023-27043	Medium	5.3	2.5%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-14.