Ericsson Packet Core Gateway (PCG) - Improper Handling of Syntactically Invalid Structure Vulnerability
CVE-2026-25657

7.1HIGH

Key Information:

Vendor

Ericsson

Status
Packet Core Gateway (pcg)
Vendor
CVE Published:
5 June 2026

What is CVE-2026-25657?

Ericsson Packet Core Gateway (PCG) versions prior to 1.30 contain an Improper Handling of Syntactically Invalid Structure (CWE-228) vulnerability where an attacker continuously sending a specially crafted message can cause service degradation. The impact continues as long the attack persists but the system recovers from the crashes when the attack stops.

Affected Version(s)

Packet Core Gateway (PCG) 0

References

https://www.ericsson.com/en/about-us/security/psirt/cve-2...

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Clemens Keil, Manfred Heinz, Patrick Walker of BDO Cyber Security GmbH
BSI 5G/6G Security Lab TEMIS (Federal Office for Information Security, Germany)
.