OpenAirInterface oai-cn5g-amf 2.2.0 Security Mode downgrade

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in OpenAirInterface oai-cn5g-amf 2.2.0. Affected by this issue is some unknown functionality of the component Security Mode. This manipulation causes downgrade. The identification of this vulnerability is CVE-2026-30080. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in OpenAirInterface oai-cn5g-amf 2.2.0 and classified as problematic. Affected by this vulnerability is an unknown code of the component Security Mode. The manipulation with an unknown input leads to a downgrade vulnerability. The CWE definition for the vulnerability is CWE-757. A protocol or its implementation supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the strongest algorithm that is available to both parties. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

OpenAirInterface v2.2.0 accepts Security Mode Complete without any integrity protection. Configuration has supported integrity NIA1 and NIA2. But if an UE sends initial registration request with only security capability IA0, OpenAirInterface accepts and proceeds. This downgrade security context can lead to the possibility of replay attack.

The advisory is shared at gitlab.eurecom.fr. This vulnerability is known as CVE-2026-30080 since 03/04/2026. The exploitation appears to be difficult. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1562.010 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.0
VulDB Temp Score: 5.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Downgrade
CWE: CWE-757
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/04/2026 CVE reserved
04/08/2026 +34 days Advisory disclosed
04/08/2026 +0 days VulDB entry created
04/08/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gitlab.eurecom.fr
Status: Not defined

CVE: CVE-2026-30080 (🔒)
GCVE (CVE): GCVE-0-2026-30080
GCVE (VulDB): GCVE-100-356269

Entryinfo

Created: 04/08/2026 18:49
Changes: 04/08/2026 18:49 (52)
Complete: 🔍
Cache ID: 216::103

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