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

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Summary

CVECVE-2026-25657
StatePUBLISHED
AssignerERIC
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-05 12:16:37 UTC
Updated2026-06-05 15:56:37 UTC
DescriptionEricsson 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.

Risk And Classification

Primary CVSS: v4.0 7.1 HIGH from 85b1779b-6ecd-4f52-bcc5-73eac4659dcf

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-228 | CWE-228 CWE-228

VersionSourceTypeScoreSeverityVector
4.085b1779b-6ecd-4f52-bcc5-73eac4659dcfSecondary7.1HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.1HIGHCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ericsson Packet Core Gateway PCG affected 1.30 1.30 Not specified

References

ReferenceSourceLinkTags
www.ericsson.com/en/about-us/security/psirt/cve-2026-25657 85b1779b-6ecd-4f52-bcc5-73eac4659dcf www.ericsson.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Clemens Keil, Manfred Heinz, Patrick Walker of BDO Cyber Security GmbH (en)

CNA: BSI 5G/6G Security Lab TEMIS (Federal Office for Information Security, Germany) (en)

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