7.5

CVE-2025-70123: free5gc Improper Input Validation

CVSS: 7.5v3.1HighAnalyzed
Published 13-02-2026Last modified 13-02-2026
Open JSON

Vulnerability summary

CVE-2025-70123 is a high (CVSS 7.5) Improper Input Validation vulnerability in free5gc. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 31.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 13-02-2026
    PublishedVulnerability first disclosed.
  2. 13-02-2026
    Last modifiedVulnerability information updated.

Description

An improper input validation and protocol compliance vulnerability in free5GC v4.0.1 allows remote attackers to cause a denial of service. The UPF incorrectly accepts a malformed PFCP Association Setup Request, violating 3GPP TS 29.244. This places the UPF in an inconsistent state where a subsequent valid PFCP Session Establishment Request triggers a cascading failure, disrupting the SMF connection and causing service degradation.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

31%

Versus all other CVEs

30-day change

+0.04 pp

From 0.35% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.39%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Free5Gc

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Free5gc1 product

1 vendor · 1 product

References

1 links