CVE-2024-14043Public exploitNetwork attack vector

Heap corruption via uncapped MSISDN conversion

Published Aug 11, 2026 · Updated Aug 11, 2026

Heap-based buffer overflow in Open5GS 2.7.0 through 2.7.1 allows remote authenticated users to corrupt MME heap memory via S6a. In mme_s6a_subscription_data_from_avp, ogs_buffer_to_bcd receives the unbounded MSISDN or A-MSISDN AVP length after the preceding copy was capped to the destination size. Reachability requires an accepted Diameter peer, an attached subscriber, and a crafted ULA or ISD message; published evidence does not establish code execution or a specific crash.

CVSS severity5.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Open5GS 2.7.0 through 2.7.1 allows remote authenticated users to corrupt MME heap memory via S6a. In mme_s6a_subscription_data_from_avp, ogs_buffer_to_bcd receives the unbounded MSISDN or A-MSISDN AVP length after the preceding copy was capped to the destination size. Reachability requires an accepted Diameter peer, an attached subscriber, and a crafted ULA or ISD message; published evidence does not establish code execution or a specific crash.

The record

CVE
CVE-2024-14043
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Open5GS
Product
Open5GS
Classifications
CWE-119, CWE-122, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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

2.1VulDBCVSS: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:P
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow
T1499Endpoint Denial of Service

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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