CVE-2025-52981Network attack vector

Service interruption via specific PIM packet sequence

Published Jul 11, 2025 · Updated Jul 15, 2025

Improper condition handling in Junos OS flowd allows remote attackers to crash and restart the daemon with a sequence of PIM packets. On affected SRX appliances, flowd fails to handle the exceptional condition triggered by the packet sequence and terminates instead of rejecting it safely. Network reachability to the PIM service is sufficient; exploitation interrupts traffic during the restart without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper condition handling in Junos OS flowd allows remote attackers to crash and restart the daemon with a sequence of PIM packets. On affected SRX appliances, flowd fails to handle the exceptional condition triggered by the packet sequence and terminates instead of rejecting it safely. Network reachability to the PIM service is sufficient; exploitation interrupts traffic during the restart without reported data disclosure or modification.

The record

CVE
CVE-2025-52981
Published
Jul 11, 2025
Updated
Jul 15, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-754, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <21.2R3-S9
  2. Affected versionversion=21.4 <21.4R3-S11
  3. Affected versionversion=22.2 <22.2R3-S7
  4. Affected versionversion=22.4 <22.4R3-S6
  5. Affected versionversion=23.2 <23.2R2-S4
  6. Affected versionversion=23.4 <23.4R2-S4
  7. Affected versionversion=24.2 <24.2R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <21.2R3-S9; version=21.4 <21.4R3-S11; version=22.2 <22.2R3-S7; version=22.4 <22.4R3-S6; version=23.2 <23.2R2-S4; version=23.4 <23.4R2-S4; version=24.2 <24.2R2

Published CVSS scores

8.7Juniper NetworksCVSS: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/RE:M
7.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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