CVE-2025-15685Public exploitNetwork attack vector

Remote service crash via malformed CER parsing

Published Aug 12, 2026 · Updated Aug 12, 2026

Memory corruption in Open5GS 2.7.0 and 2.7.1 freeDiameter allows remote authenticated users to crash a Diameter service. The parserules_check_one_rule path enters an unrecoverable error branch for a malformed Capabilities-Exchange-Request, and diam_log_func escalates it to an unconditional abort. Network access to the configured Diameter listener, commonly TCP or SCTP port 3868, is required; one crafted request terminates the worker process.

CVSS severity5.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Open5GS 2.7.0 and 2.7.1 freeDiameter allows remote authenticated users to crash a Diameter service. The parserules_check_one_rule path enters an unrecoverable error branch for a malformed Capabilities-Exchange-Request, and diam_log_func escalates it to an unconditional abort. Network access to the configured Diameter listener, commonly TCP or SCTP port 3868, is required; one crafted request terminates the worker process.

The record

CVE
CVE-2025-15685
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
Open5GS
Product
Open5GS
Classifications
CWE-119, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.7.0
  2. Affected versionversion=2.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Open5GS · Open5GSversion=2.7.0; version=2.7.1

Published CVSS scores

5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Memory Corruption
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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