CVE-2026-20433

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: MOLY01088681; Issue ID: MSV-4460.

Published: 2026-04-07 Last update: 2026-04-10 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-20433 is rated Moderate Risk (44.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.34%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-20433

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.34% +0.32%
2 2026-04-21 0.06% 0.02% -0.03%
3 2026-04-07 — 0.06% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20433

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-20433

Affected software / configurations for CVE-2026-20433

Vendor Product Version Raw CPE
mediatek mt2735_firmware — cpe:2.3:o:mediatek:mt2735_firmware:-:*:*:*:*:*:*:*
mediatek mt2737_firmware — cpe:2.3:o:mediatek:mt2737_firmware:-:*:*:*:*:*:*:*
mediatek mt6813_firmware — cpe:2.3:o:mediatek:mt6813_firmware:-:*:*:*:*:*:*:*
mediatek mt6833_firmware — cpe:2.3:o:mediatek:mt6833_firmware:-:*:*:*:*:*:*:*
mediatek mt6833p_firmware — cpe:2.3:o:mediatek:mt6833p_firmware:-:*:*:*:*:*:*:*
mediatek mt6835_firmware — cpe:2.3:o:mediatek:mt6835_firmware:-:*:*:*:*:*:*:*
mediatek mt6835t_firmware — cpe:2.3:o:mediatek:mt6835t_firmware:-:*:*:*:*:*:*:*
mediatek mt6853_firmware — cpe:2.3:o:mediatek:mt6853_firmware:-:*:*:*:*:*:*:*
mediatek mt6853t_firmware — cpe:2.3:o:mediatek:mt6853t_firmware:-:*:*:*:*:*:*:*
mediatek mt6855_firmware — cpe:2.3:o:mediatek:mt6855_firmware:-:*:*:*:*:*:*:*
mediatek mt6855t_firmware — cpe:2.3:o:mediatek:mt6855t_firmware:-:*:*:*:*:*:*:*
mediatek mt6873_firmware — cpe:2.3:o:mediatek:mt6873_firmware:-:*:*:*:*:*:*:*
mediatek mt6875_firmware — cpe:2.3:o:mediatek:mt6875_firmware:-:*:*:*:*:*:*:*
mediatek mt6875t_firmware — cpe:2.3:o:mediatek:mt6875t_firmware:-:*:*:*:*:*:*:*
mediatek mt6877_firmware — cpe:2.3:o:mediatek:mt6877_firmware:-:*:*:*:*:*:*:*
mediatek mt6877t_firmware — cpe:2.3:o:mediatek:mt6877t_firmware:-:*:*:*:*:*:*:*
mediatek mt6877tt_firmware — cpe:2.3:o:mediatek:mt6877tt_firmware:-:*:*:*:*:*:*:*
mediatek mt6878_firmware — cpe:2.3:o:mediatek:mt6878_firmware:-:*:*:*:*:*:*:*
mediatek mt6878m_firmware — cpe:2.3:o:mediatek:mt6878m_firmware:-:*:*:*:*:*:*:*
mediatek mt6879_firmware — cpe:2.3:o:mediatek:mt6879_firmware:-:*:*:*:*:*:*:*
mediatek mt6880_firmware — cpe:2.3:o:mediatek:mt6880_firmware:-:*:*:*:*:*:*:*
mediatek mt6883_firmware — cpe:2.3:o:mediatek:mt6883_firmware:-:*:*:*:*:*:*:*
mediatek mt6885_firmware — cpe:2.3:o:mediatek:mt6885_firmware:-:*:*:*:*:*:*:*
mediatek mt6886_firmware — cpe:2.3:o:mediatek:mt6886_firmware:-:*:*:*:*:*:*:*
mediatek mt6889_firmware — cpe:2.3:o:mediatek:mt6889_firmware:-:*:*:*:*:*:*:*
mediatek mt6890_firmware — cpe:2.3:o:mediatek:mt6890_firmware:-:*:*:*:*:*:*:*
mediatek mt6891_firmware — cpe:2.3:o:mediatek:mt6891_firmware:-:*:*:*:*:*:*:*
mediatek mt6893_firmware — cpe:2.3:o:mediatek:mt6893_firmware:-:*:*:*:*:*:*:*
mediatek mt6895_firmware — cpe:2.3:o:mediatek:mt6895_firmware:-:*:*:*:*:*:*:*
mediatek mt6895tt_firmware — cpe:2.3:o:mediatek:mt6895tt_firmware:-:*:*:*:*:*:*:*
mediatek mt6896_firmware — cpe:2.3:o:mediatek:mt6896_firmware:-:*:*:*:*:*:*:*
mediatek mt6897_firmware — cpe:2.3:o:mediatek:mt6897_firmware:-:*:*:*:*:*:*:*
mediatek mt6899_firmware — cpe:2.3:o:mediatek:mt6899_firmware:-:*:*:*:*:*:*:*
mediatek mt6980_firmware — cpe:2.3:o:mediatek:mt6980_firmware:-:*:*:*:*:*:*:*
mediatek mt6980d_firmware — cpe:2.3:o:mediatek:mt6980d_firmware:-:*:*:*:*:*:*:*
mediatek mt6983_firmware — cpe:2.3:o:mediatek:mt6983_firmware:-:*:*:*:*:*:*:*
mediatek mt6983t_firmware — cpe:2.3:o:mediatek:mt6983t_firmware:-:*:*:*:*:*:*:*
mediatek mt6985_firmware — cpe:2.3:o:mediatek:mt6985_firmware:-:*:*:*:*:*:*:*
mediatek mt6985t_firmware — cpe:2.3:o:mediatek:mt6985t_firmware:-:*:*:*:*:*:*:*
mediatek mt6989_firmware — cpe:2.3:o:mediatek:mt6989_firmware:-:*:*:*:*:*:*:*
mediatek mt6989t_firmware — cpe:2.3:o:mediatek:mt6989t_firmware:-:*:*:*:*:*:*:*
mediatek mt6990_firmware — cpe:2.3:o:mediatek:mt6990_firmware:-:*:*:*:*:*:*:*
mediatek mt6991_firmware — cpe:2.3:o:mediatek:mt6991_firmware:-:*:*:*:*:*:*:*
mediatek mt8668_firmware — cpe:2.3:o:mediatek:mt8668_firmware:-:*:*:*:*:*:*:*
mediatek mt8673_firmware — cpe:2.3:o:mediatek:mt8673_firmware:-:*:*:*:*:*:*:*
mediatek mt8675_firmware — cpe:2.3:o:mediatek:mt8675_firmware:-:*:*:*:*:*:*:*
mediatek mt8676_firmware — cpe:2.3:o:mediatek:mt8676_firmware:-:*:*:*:*:*:*:*
mediatek mt8678_firmware — cpe:2.3:o:mediatek:mt8678_firmware:-:*:*:*:*:*:*:*
mediatek mt8755_firmware — cpe:2.3:o:mediatek:mt8755_firmware:-:*:*:*:*:*:*:*
mediatek mt8771_firmware — cpe:2.3:o:mediatek:mt8771_firmware:-:*:*:*:*:*:*:*
mediatek mt8775_firmware — cpe:2.3:o:mediatek:mt8775_firmware:-:*:*:*:*:*:*:*
mediatek mt8791_firmware — cpe:2.3:o:mediatek:mt8791_firmware:-:*:*:*:*:*:*:*
mediatek mt8791t_firmware — cpe:2.3:o:mediatek:mt8791t_firmware:-:*:*:*:*:*:*:*
mediatek mt8792_firmware — cpe:2.3:o:mediatek:mt8792_firmware:-:*:*:*:*:*:*:*
mediatek mt8793_firmware — cpe:2.3:o:mediatek:mt8793_firmware:-:*:*:*:*:*:*:*
mediatek mt8795t_firmware — cpe:2.3:o:mediatek:mt8795t_firmware:-:*:*:*:*:*:*:*
mediatek mt8797_firmware — cpe:2.3:o:mediatek:mt8797_firmware:-:*:*:*:*:*:*:*
mediatek mt8798_firmware — cpe:2.3:o:mediatek:mt8798_firmware:-:*:*:*:*:*:*:*
mediatek mt8863_firmware — cpe:2.3:o:mediatek:mt8863_firmware:-:*:*:*:*:*:*:*
mediatek mt8873_firmware — cpe:2.3:o:mediatek:mt8873_firmware:-:*:*:*:*:*:*:*
mediatek mt8883_firmware — cpe:2.3:o:mediatek:mt8883_firmware:-:*:*:*:*:*:*:*
mediatek mt8893_firmware — cpe:2.3:o:mediatek:mt8893_firmware:-:*:*:*:*:*:*:*

References for CVE-2026-20433

cvelogic Threat Intelligence