CVE-2026-21917

EPSS 0.38%
Veröffentlicht 15.01.2026 20:27:11
Zuletzt bearbeitet 23.01.2026 19:41:44
Erkennungen
Login

Junos OS: SRX Series: Specifically malformed SSL packet causes FPC crash

An Improper Validation of Syntactic Correctness of Input vulnerability in the Web-Filtering module of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).

If an SRX device configured for UTM Web-Filtering receives a specifically malformed SSL packet, this will cause an FPC crash and restart.
This issue affects Junos OS on SRX Series:



  *  23.2 versions from 23.2R2-S2 before 23.2R2-S5, 
  *  23.4 versions from 23.4R2-S1 before 23.4R2-S5,
  *  24.2 versions before 24.2R2-S2,
  *  24.4 versions before 24.4R1-S3, 24.4R2.


Earlier versions of Junos are also affected, but no fix is available.

Betroffene Produkte Warnungen 0 Metriken 3 CWE 1 Referenzen 5

NVD 17 VulnDex Vulnerability Enrichment 1

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Juniper ≫ Junos Version 23.2 Update r2-s2

   Juniper ≫ Srx1500 Version -
   Juniper ≫ Srx1600 Version -
   Juniper ≫ Srx2300 Version -
   Juniper ≫ Srx300 Version -
   Juniper ≫ Srx320 Version -
   Juniper ≫ Srx340 Version -
   Juniper ≫ Srx345 Version -
   Juniper ≫ Srx380 Version -
   Juniper ≫ Srx4100 Version -
   Juniper ≫ Srx4120 Version -
   Juniper ≫ Srx4200 Version -
   Juniper ≫ Srx4300 Version -
   Juniper ≫ Srx4600 Version -
   Juniper ≫ Srx4700 Version -
   Juniper ≫ Srx5400 Version -
   Juniper ≫ Srx5600 Version -
   Juniper ≫ Srx5800 Version -

Juniper ≫ Junos Version 23.2 Update r2-s3

Juniper ≫ Junos Version 23.2 Update r2-s4

Juniper ≫ Junos Version 23.4 Update r2-s1

Juniper ≫ Junos Version 23.4 Update r2-s2

Juniper ≫ Junos Version 23.4 Update r2-s3

Juniper ≫ Junos Version 23.4 Update r2-s4

Juniper ≫ Junos Version 24.2 Update -

Juniper ≫ Junos Version 24.2 Update r1

Juniper ≫ Junos Version 24.2 Update r1-s1

Juniper ≫ Junos Version 24.2 Update r1-s2

Juniper ≫ Junos Version 24.2 Update r2

Juniper ≫ Junos Version 24.2 Update r2-s1

Juniper ≫ Junos Version 24.4 Update -

Juniper ≫ Junos Version 24.4 Update r1

Juniper ≫ Junos Version 24.4 Update r1-s2

Juniper ≫ Junos Version 24.4 Update r2

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

Zu dieser CVE wurde keine Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.38%	0.312

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
Juniper	7.5	3.9	3.6	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Juniper	8.7	0	0	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:Y/R:A/V:X/RE:M/U:X

CWE-1286 Improper Validation of Syntactic Correctness of Input

The product receives input that is expected to be well-formed - i.e., to comply with a certain syntax - but it does not validate or incorrectly validates that the input complies with the syntax.

https://supportportal.juniper.net/JSA105996

Vendor Advisory

https://kb.juniper.net/JSA105996

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2026-21917

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-21917

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-21917

EUVD

Team-orientierte Vulnerability Management Plattform

Features der Plattform

CVE-2026-21917