CVE-2025-52960Network attack vector

Unauthenticated process crash via unchecked SIP packet copy

Published Oct 9, 2025 · Updated Oct 9, 2025

Buffer overflow in the SIP ALG of Juniper Networks Junos OS allows remote attackers to crash flowd or mspmand with crafted SIP packets. The SIP ALG copies attacker-controlled packet data without checking its size, causing the process to terminate when memory utilization is high. Exploitation requires high memory utilization outside attacker control; repeated packets during that condition sustain service interruption, while the system otherwise recovers automatically.

CVSS severity8.2
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the SIP ALG of Juniper Networks Junos OS allows remote attackers to crash flowd or mspmand with crafted SIP packets. The SIP ALG copies attacker-controlled packet data without checking its size, causing the process to terminate when memory utilization is high. Exploitation requires high memory utilization outside attacker control; repeated packets during that condition sustain service interruption, while the system otherwise recovers automatically.

The record

CVE
CVE-2025-52960
Published
Oct 9, 2025
Updated
Oct 9, 2025
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-120, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 9, 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 <22.4R3-S7
  2. Affected versionversion=23.2 <23.2R2-S4
  3. Affected versionversion=23.4 <23.4R2-S5
  4. Affected versionversion=24.2 <24.2R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <22.4R3-S7; version=23.2 <23.2R2-S4; version=23.4 <23.4R2-S5; version=24.2 <24.2R2

Published CVSS scores

5.9Juniper Networks, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2Juniper Networks, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1498Network Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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