7.1

CVE-2026-21903

A Stack-based Buffer Overflow vulnerability in the Packet Forwarding Engine (pfe) of Juniper Networks Junos OS allows a network-based attacker, authenticated with low privileges to cause a Denial-of-Service (DoS).



Subscribing to telemetry sensors at scale causes all FPC connections to drop, resulting in an FPC crash and restart.
The issue was not seen when YANG packages for the specific sensors were installed. 



This issue affects Junos OS: 



  *  all versions before 22.4R3-S7,
  *  23.2 version before 23.2R2-S4,
  *  23.4 versions before 23.4R2.
Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Juniper ≫ Junos Version < 22.4
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 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 Version23.4 Update-
Juniper ≫ Junos Version23.4 Updater1
Juniper ≫ Junos Version23.4 Updater1-s1
Juniper ≫ Junos Version23.4 Updater1-s2
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.04% 0.125
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
sirt@juniper.net 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
sirt@juniper.net 7.1 0 0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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:X/R:X/V:X/RE:X/U:X
CWE-121 Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).