CVE-2026-21906

EPSS 0.05%
Veröffentlicht 15.01.2026 20:20:32
Zuletzt bearbeitet 23.01.2026 19:40:34
Quelle sirt@juniper.net
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An Improper Handling of Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated network-based attacker sending a specific ICMP packet through a GRE tunnel to cause the PFE to crash and restart.

When PowerMode IPsec (PMI) and GRE performance acceleration are enabled and the device receives a specific ICMP packet, a crash occurs in the SRX PFE, resulting in traffic loss. PMI is enabled by default, and GRE performance acceleration can be enabled by running the configuration command shown below. PMI is a mode of operation that provides IPsec performance improvements using Vector Packet Processing.

Note that PMI with GRE performance acceleration is only supported on specific SRX platforms.
This issue affects Junos OS on the SRX Series:



  *  all versions before 21.4R3-S12, 
  *  from 22.4 before 22.4R3-S8, 
  *  from 23.2 before 23.2R2-S5, 
  *  from 23.4 before 23.4R2-S5, 
  *  from 24.2 before 24.2R2-S3, 
  *  from 24.4 before 24.4R2-S1, 
  *  from 25.2 before 25.2R1-S1, 25.2R2.

Betroffene Produkte Warnungen 0 Metriken 3 CWE 1 Referenzen 6

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD

Diese Information steht angemeldeten Benutzern zur Verfügung.

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Juniper ≫ Junos Version < 21.4

   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 Version21.4 Update-

Juniper ≫ Junos Version21.4 Updater1

Juniper ≫ Junos Version21.4 Updater1-s1

Juniper ≫ Junos Version21.4 Updater1-s2

Juniper ≫ Junos Version21.4 Updater2

Juniper ≫ Junos Version21.4 Updater2-s1

Juniper ≫ Junos Version21.4 Updater2-s2

Juniper ≫ Junos Version21.4 Updater3

Juniper ≫ Junos Version21.4 Updater3-s1

Juniper ≫ Junos Version21.4 Updater3-s10

Juniper ≫ Junos Version21.4 Updater3-s11

Juniper ≫ Junos Version21.4 Updater3-s2

Juniper ≫ Junos Version21.4 Updater3-s3

Juniper ≫ Junos Version21.4 Updater3-s4

Juniper ≫ Junos Version21.4 Updater3-s5

Juniper ≫ Junos Version21.4 Updater3-s6

Juniper ≫ Junos Version21.4 Updater3-s7

Juniper ≫ Junos Version21.4 Updater3-s8

Juniper ≫ Junos Version21.4 Updater3-s9

Juniper ≫ Junos Version22.4 Update-

Juniper ≫ Junos Version22.4 Updater1

Juniper ≫ Junos Version22.4 Updater1-s1

Juniper ≫ Junos Version22.4 Updater1-s2

Juniper ≫ Junos Version22.4 Updater2

Juniper ≫ Junos Version22.4 Updater2-s1

Juniper ≫ Junos Version22.4 Updater2-s2

Juniper ≫ Junos Version22.4 Updater3

Juniper ≫ Junos Version22.4 Updater3-s1

Juniper ≫ Junos Version22.4 Updater3-s2

Juniper ≫ Junos Version22.4 Updater3-s3

Juniper ≫ Junos Version22.4 Updater3-s4

Juniper ≫ Junos Version22.4 Updater3-s5

Juniper ≫ Junos Version22.4 Updater3-s6

Juniper ≫ Junos Version22.4 Updater3-s7

Juniper ≫ Junos Version23.2 Update-

Juniper ≫ Junos Version23.2 Updater1

Juniper ≫ Junos Version23.2 Updater1-s1

Juniper ≫ Junos Version23.2 Updater1-s2

Juniper ≫ Junos Version23.2 Updater2

Juniper ≫ Junos Version23.2 Updater2-s1

Juniper ≫ Junos Version23.2 Updater2-s2

Juniper ≫ Junos Version23.2 Updater2-s3

Juniper ≫ Junos Version23.2 Updater2-s4

Juniper ≫ Junos Version23.4 Update-

Juniper ≫ Junos Version23.4 Updater1

Juniper ≫ Junos Version23.4 Updater1-s1

Juniper ≫ Junos Version23.4 Updater1-s2

Juniper ≫ Junos Version23.4 Updater2

Juniper ≫ Junos Version23.4 Updater2-s1

Juniper ≫ Junos Version23.4 Updater2-s2

Juniper ≫ Junos Version23.4 Updater2-s3

Juniper ≫ Junos Version23.4 Updater2-s4

Juniper ≫ Junos Version24.2 Update-

Juniper ≫ Junos Version24.2 Updater1

Juniper ≫ Junos Version24.2 Updater1-s1

Juniper ≫ Junos Version24.2 Updater1-s2

Juniper ≫ Junos Version24.2 Updater2

Juniper ≫ Junos Version24.2 Updater2-s1

Juniper ≫ Junos Version24.2 Updater2-s2

Juniper ≫ Junos Version24.4 Update-

Juniper ≫ Junos Version24.4 Updater1

Juniper ≫ Junos Version24.4 Updater1-s2

Juniper ≫ Junos Version24.4 Updater1-s3

Juniper ≫ Junos Version24.4 Updater2

Juniper ≫ Junos Version25.2 Update-

Juniper ≫ Junos Version25.2 Updater1

Juniper ≫ Junos Version25.2 Updater2

Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.05%	0.166

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
sirt@juniper.net	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
sirt@juniper.net	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:C/RE:M/U:Red

CWE-755 Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

https://supportportal.juniper.net/JSA106005

Vendor Advisory

https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/topic-map/security-powermode-ipsec-vpn.html

Technical Description

https://kb.juniper.net/JSA106005

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2026-21906

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-21906

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-21906

EUVD