PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-25657 Ericsson CVE debrief

CVE-2026-25657 is a HIGH severity vulnerability in Ericsson Packet Core Gateway (PCG) versions prior to 1.30. An attacker can cause service degradation by continuously sending specially crafted messages. The impact persists as long as the attack continues, but the system recovers when the attack stops.

Vendor
Ericsson
Product
Packet Core Gateway
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-08
Advisory published
2026-06-05
Advisory updated
2026-06-08

Who should care

Administrators and security teams responsible for Ericsson Packet Core Gateway (PCG) versions prior to 1.30 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by Improper Handling of Syntactically Invalid Structure (CWE-228). An attacker can exploit this vulnerability by continuously sending specially crafted messages, leading to service degradation.

Defensive priority

HIGH

Recommended defensive actions

  • Upgrade to Ericsson Packet Core Gateway (PCG) version 1.30 or later.
  • Implement network monitoring and intrusion detection to identify and block suspicious traffic.
  • Restrict access to the Ericsson Packet Core Gateway (PCG) to only trusted sources.

Evidence notes

The CVE-2026-25657 vulnerability was published on [cvePublishedAt] and modified on [cveModifiedAt]. The CVSS score is 7.1, indicating a HIGH severity vulnerability.

Official resources

CVE-2026-25657 was published on 2026-06-05T12:16:37.750Z and modified on 2026-06-08T14:21:47.350Z.