CVE-2023-32840

Local privilege escalation via unchecked CCCI buffer write

Published Nov 6, 2023 · Updated Sep 5, 2024

Out-of-bounds write in MediaTek modem CCCI firmware allows local users with System privileges to escalate privilege via crafted input. The CCCI component writes beyond a buffer because it fails to enforce a required bounds check on input. Exploitation requires local access and System execution privileges, and user interaction is also required in some attack paths.

CVSS severity6.5

Medium

EPSS probability0.18%

Next 30 days · Sep 16, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2023-32840
Published: Nov 6, 2023
Updated: Sep 5, 2024

Vendor: MediaTek
Product: MT6897
Classifications: CWE-787, T1068

Attack vector: local
Privileges: admin

Timeline

How it unfolded

Nov 6, 2023CVE publishedPublication date reported by the CVE source.
Sep 5, 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?

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

Affected versionversion=0 <=*

What conditions does exploitation require?

Attack vectorlocal

Required privilegesadmin

What is affected?

MediaTek · MT6897version=0 <=*

MediaTek · MT8667version=0 <=*

MediaTek · MT8768version=0 <=*

MediaTek · MT6889version=0 <=*

MediaTek · MT6769Tversion=0 <=*

MediaTek · MT6880version=0 <=*

MediaTek · MT6875version=0 <=*

MediaTek · MT2731version=0 <=*

MediaTek · MT6877Tversion=0 <=*

MediaTek · MT6813version=0 <=*

MediaTek · MT6835version=0 <=*

MediaTek · MT6891version=0 <=*

MediaTek · MT6985Tversion=0 <=*

MediaTek · MT6768version=0 <=*

MediaTek · MT6980version=0 <=*

MediaTek · MT6890version=0 <=*

MediaTek · MT6853Tversion=0 <=*

MediaTek · MT6855version=0 <=*

MediaTek · MT8766version=0 <=*

MediaTek · MT6990version=0 <=*

MediaTek · MT6763version=0 <=*

MediaTek · MediaTek MT6765version=0 <=*

MediaTek · MT2735version=0 <=*

MediaTek · MT6893version=0 <=*

MediaTek · MT6885version=0 <=*

MediaTek · MT6769version=0 <=*

MediaTek · MT8666version=0 <=*

MediaTek · MT6980Dversion=0 <=*

MediaTek · MT8798version=0 <=*

MediaTek · MT8791Tversion=0 <=*

MediaTek · MT6879version=0 <=*

MediaTek · MT6873version=0 <=*

MediaTek · MT8791version=0 <=*

MediaTek · MT6896version=0 <=*

MediaTek · MT6895Tversion=0 <=*

MediaTek · MT6739version=0 <=*

MediaTek · MT6877version=0 <=*

MediaTek · MediaTek MT6878version=0 <=*

MediaTek · MT6886version=0 <=*

MediaTek · MediaTek MT6761version=0 <=*

MediaTek · MT8786version=0 <=*

MediaTek · MT8675version=0 <=*

MediaTek · MT6731version=0 <=*

MediaTek · MT6983Tversion=0 <=*

MediaTek · MediaTek MT6762version=0 <=*

MediaTek · MT6853version=0 <=*

MediaTek · MT6833Pversion=0 <=*

MediaTek · MT8781version=0 <=*

MediaTek · MT6771version=0 <=*

MediaTek · MT8789version=0 <=*

MediaTek · MT8673version=0 <=*

MediaTek · MT6883version=0 <=*

MediaTek · MT6985version=0 <=*

MediaTek · MT8788version=0 <=*

MediaTek · MT6833version=0 <=*

MediaTek · MT8797version=0 <=*

MediaTek · MT6769Zversion=0 <=*

MediaTek · MT8765version=0 <=*

MediaTek · MT6895version=0 <=*

MediaTek · MT6989version=0 <=*

MediaTek · MT6767version=0 <=*

Published CVSS scores

8.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

6.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026

Latest reporting daySep 15, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectorlocal

Privilegesadmin

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

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