CVE-2026-20503
In Modem, there is a possible system crash due to a missing bounds check. This could lead to...
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01371002; Issue ID: MSV-9020.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01371002; Issue ID: MSV-9020.
- Record
CVE-2026-20503- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
EUVDEUVD-2026-72196
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01371002; Issue ID: MSV-9020.
- Record
EUVD-2026-72196- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-x74h-78mc-6jq7
In Modem, there is a possible system crash due to a missing bounds check. This could lead to...
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01371002; Issue ID: MSV-9020.
- Record
GHSA-x74h-78mc-6jq7- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
NVD
In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01371002; Issue ID: MSV-9020.
- Record
CVE-2026-20503- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-617
- Updated
- 2026-11-02
Affected products
- mediatek mt2716 firmware
- mediatek mt2735 firmware
- mediatek mt2737 firmware
- mediatek mt6813 firmware
- mediatek mt6833 firmware
- mediatek mt6835 firmware
- mediatek mt6853 firmware
- mediatek mt6855 firmware
- mediatek mt6858 firmware
- mediatek mt6873 firmware
- mediatek mt6875 firmware
- mediatek mt6877 firmware
Show 46 moreShow less
- mediatek mt6878 firmware
- mediatek mt6879 firmware
- mediatek mt6880 firmware
- mediatek mt6881 firmware
- mediatek mt6883 firmware
- mediatek mt6885 firmware
- mediatek mt6886 firmware
- mediatek mt6889 firmware
- mediatek mt6890 firmware
- mediatek mt6891 firmware
- mediatek mt6893 firmware
- mediatek mt6895 firmware
- mediatek mt6896 firmware
- mediatek mt6897 firmware
- mediatek mt6899 firmware
- mediatek mt6980 firmware
- mediatek mt6982vb firmware
- mediatek mt6983 firmware
- mediatek mt6985 firmware
- mediatek mt6986 firmware
- mediatek mt6988 firmware
- mediatek mt6989 firmware
- mediatek mt6990 firmware
- mediatek mt6991 firmware
- mediatek mt6993 firmware
- mediatek mt8668 firmware
- mediatek mt8673 firmware
- mediatek mt8675 firmware
- mediatek mt8676 firmware
- mediatek mt8678 firmware
- mediatek mt8755 firmware
- mediatek mt8771 firmware
- mediatek mt8775 firmware
- mediatek mt8791 firmware
- mediatek mt8791t firmware
- mediatek mt8792 firmware
- mediatek mt8793 firmware
- mediatek mt8795t firmware
- mediatek mt8796 firmware
- mediatek mt8797 firmware
- mediatek mt8798 firmware
- mediatek mt8863 firmware
- mediatek mt8873 firmware
- mediatek mt8883 firmware
- mediatek mt8893 firmware
- mediatek, inc. mediatek chipset
Affected packages
| Package | Affected | Fixed |
|---|---|---|
:unknown:Android |
SoCVersion:0 up to SoCVersion:2026-09-05, plus listed versions SoCVersion |
SoCVersion:2026-09-05 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-20503 is a medium vulnerability (CVSS 5.3) in Mediatek Mt2716 Firmware, published September 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in :unknown: SoCVersion:2026-09-05.