CVE-2023-32846Public exploit

Modem reboot via truncated RRC configuration

Published Dec 4, 2023 · Updated Aug 2, 2024

Reachable assertion in MediaTek 5G Modem NR15 through NR17 allows physically proximate attackers to reboot the modem via a malformed RRC message. A malicious gNB sends a truncated RRC Connection Setup whose altered physicalCellGroupConfig fields cause encoding errors and a null-pointer dereference. The pre-authentication attack requires radio-range access and a rogue 5G base station; repeated triggers interrupt 3G, 4G, and 5G service.

CVSS severity7.5
High
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertion in MediaTek 5G Modem NR15 through NR17 allows physically proximate attackers to reboot the modem via a malformed RRC message. A malicious gNB sends a truncated RRC Connection Setup whose altered physicalCellGroupConfig fields cause encoding errors and a null-pointer dereference. The pre-authentication attack requires radio-range access and a rogue 5G base station; repeated triggers interrupt 3G, 4G, and 5G service.

The record

CVE
CVE-2023-32846
Published
Dec 4, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-617, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-617Reachable Assertion
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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