Riskcovery

CVE-2026-33790

Junos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 packet will cause the srxpfe process to crash and restart.

State
Published
Severity
8.7 High
Published
Apr 9, 2026
Updated
Apr 10, 2026
Reserved
Mar 23, 2026

Read the record on cve.org

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the flow daemon (flowd) of Juniper Networks Junos OS on SRX Series allows an attacker sending a specific, malformed ICMPv6 packet to cause the srxpfe process to crash and restart. Continued receipt and processing of these packets will repeatedly crash the srxpfe process and sustain the Denial of Service (DoS) condition.

During NAT64 translation, receipt of a specific, malformed ICMPv6 packet destined to the device will cause the srxpfe process to crash and restart.

This issue cannot be triggered using IPv4 nor other IPv6 traffic.

This issue affects Junos OS on SRX Series: * all versions before 21.2R3-S10, * all versions of 21.3, * from 21.4 before 21.4R3-S12, * all versions of 22.1, * from 22.2 before 22.2R3-S8, * all versions of 22.4, * from 22.4 before 22.4R3-S9, * from 23.2 before 23.2R2-S6, * from 23.4 before 23.4R2-S7, * from 24.2 before 24.2R2-S3, * from 24.4 before 24.4R2-S3, * from 25.2 before 25.2R1-S2, 25.2R2.

Scores

CVSSScoreVectorSource
4.08.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:A/V:C/RE:M/U:Amberjuniper
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hjuniper

Weaknesses

  • CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

ProductVersions
Junos OSJuniper Networks
  • before 21.2R3-S10Affected
  • 21.4 to before 21.4R3-S12Affected
  • 22.2 to before 22.2R3-S8Affected
  • 22.4 to before 22.4R3-S9Affected
  • 23.2 to before 23.2R2-S6Affected
  • 23.4 to before 23.4R2-S7Affected
  • 24.2 to before 24.2R2-S3Affected
  • 24.4 to before 24.4R2-S3Affected
  • 25.2 to before 25.2R1-S2, 25.2R2Affected
  • 21.3 to before 21.3*Affected
  • 22.1 to before 22.1*Affected
  • 22.3 to before 22.3*Affected

References

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