# CVE-2025-59174: Ericsson Packet Core Controller denial of service via malformed messages

Source: https://junglewise.ai/threats/cve-2025-59174-ericsson-packet-core-controller-denial-of-service-via-malformed  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-05. Updated: 2026-06-05  
License: CC BY 4.0 with a link back

CVE-2025-59174 · Severity: medium · CVSS 6.5 · Published 2026-06-05

The Ericsson Packet Core Controller, a critical component in mobile telecommunications networks for managing data traffic, is vulnerable to a denial-of-service attack. An attacker on the same local network can send a high volume of malformed messages to the system, causing it to slow down or become unavailable. This could lead to service disruptions for mobile users and impact the overall reliability of the cellular network infrastructure.

Technologies: [Ericsson Packet Core Controller](https://junglewise.ai/threats/technologies/packet-core-controller). Vendors: [Ericsson](https://junglewise.ai/threats/vendors/ericsson).

## Quick answers

**Is CVE-2025-59174 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-59174 being exploited in the wild.

**How severe is CVE-2025-59174?** Medium severity, with a CVSS score of 6.5, published 5 June 2026.

**Which products and versions are affected?** Ericsson Packet Core Controller prior to 1.39.

**Is there a fix for CVE-2025-59174?** A patch was published on 2026-06-05: Fix available in version 1.39. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-59174 attacked?** It is attacked from the adjacent network, in a network appliance.

**Am I affected by CVE-2025-59174?** Check whether you run Ericsson Packet Core Controller at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Ericsson Packet Core Controller (PCC) is susceptible to a denial-of-service (DoS) vulnerability due to improper handling of syntactically invalid structures (CWE-228). An unauthenticated attacker with adjacent network access can exploit this by flooding the controller with a large volume of specially crafted messages. This resource exhaustion or processing error leads to significant service degradation or loss of availability. The vulnerability is addressed in PCC version 1.39. The CVSS 4.0 score provided by the vendor is 7.1, while the CVSS 3.1 score is 6.5.

## Affected products

- Ericsson Packet Core Controller (PCC) prior to 1.39

## Timeline

- 2026-06-05: advisory: NVD and Ericsson published the vulnerability details.
- 2026-06-05: patched: Fix available in version 1.39.

## References

- [https://ericsson.com/en/about-us/security/psirt/CVE-2025-59174](https://ericsson.com/en/about-us/security/psirt/CVE-2025-59174)

## Related threats

- [Ericsson Packet Core Controller directory traversal in Configuration Management](https://junglewise.ai/threats/cve-2025-59181-ericsson-packet-core-controller-directory-traversal-in)
- [Ericsson Packet Core Controller hardcoded credentials in alarm system](https://junglewise.ai/threats/cve-2025-59180-ericsson-packet-core-controller-hardcoded-credentials-in-alarm)
- [Ericsson Packet Core Controller information exposure in Configuration Management](https://junglewise.ai/threats/cve-2025-59178-ericsson-packet-core-controller-information-exposure-in)
- [Ericsson Packet Core Controller information disclosure in Configuration Management](https://junglewise.ai/threats/cve-2025-59177-ericsson-packet-core-controller-information-disclosure-in)
- [Ericsson Packet Core Controller OS command injection](https://junglewise.ai/threats/cve-2025-59172-ericsson-packet-core-controller-os-command-injection)