CVE-2025-52982: Juniper Networks Junos OS · Improper Resource Shutdown or Release
Affects Juniper Networks Junos OSSource CVE Database V5
Not known to be exploited · CVSS 5.9 Medium.
Data as of 26 Oct 2026, 06:26 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Juniper Networks Junos OS | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2025-52982, European organizations should: 1) Identify all Juniper MX Series devices with MS-MPC modules in their network and verify the Junos OS versions in use. 2) Upgrade affected devices to Junos OS versions that include the fix: versions 21.2R3-S9 or later for the 21.2 branch, 21.4 versions after 21.4R1, 22.2 versions from 22.2R3-S6 onwards, and 22.4 versions from 22.4R3-S6 onwards. 3) If immediate upgrade is not feasible, consider disabling SIP ALG functionality or reducing the number of service sets processing SIP calls to one, if operationally acceptable, to avoid triggering the vulnerability. 4) Implement network segmentation and access controls to limit exposure of MX Series devices to untrusted networks, reducing the attack surface. 5) Monitor network traffic for unusual SIP call patterns that could indicate attempts to exploit this vulnerability. 6) Engage with Juniper Networks support for any available patches or workarounds and stay updated on vendor advisories. 7) Conduct regular vulnerability assessments and penetration testing focusing on SIP infrastructure and routing devices to detect potential exploitation attempts.
Description
An Improper Resource Shutdown or Release vulnerability in the SIP ALG of Juniper Networks Junos OS on MX Series with MS-MPC allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). When an MX Series device with an MS-MPC is configured with two or more service sets which are both processing SIP calls, a specific sequence of call events will lead to a crash and restart of the MS-MPC. This issue affects Junos OS: * all versions before 21.2R3-S9, * 21.4 versions from 21.4R1, * 22.2 versions before 22.2R3-S6, * 22.4 versions before 22.4R3-S6. As the MS-MPC is EoL after Junos OS 22.4, later versions are not affected. This issue does not affect MX-SPC3 or SRX Series devices.