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CVE-2026-20404In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has…

Description

In Modem, there is a possible system crash due to improper input validation. 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: MOLY01689248; Issue ID: MSV-4837.

Timeline

  1. ID reserved

    By MediaTek

  2. · 3 months later

    Published

  3. · 56 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-20404, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Modified3.1Medium6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.49% · top 57% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Affected products

  • MediaTek, Inc. · MediaTek chipset

    • affected MT2735
    • affected MT2737
    • affected MT6813
    • affected MT6815
    • affected MT6833
    • affected MT6835
    • affected MT6853
    • affected MT6855
    • affected MT6858
    • affected MT6873
    • affected MT6875
    • affected MT6877
    • affected MT6878
    • affected MT6879
    • affected MT6880
    • affected MT6883
    • affected MT6885
    • affected MT6886
    • affected MT6889
    • affected MT6890
    • affected MT6891
    • affected MT6893
    • affected MT6895
    • affected MT6896
    • affected MT6897
    • affected MT6899
    • affected MT6980
    • affected MT6983
    • affected MT6985
    • affected MT6986
    • affected MT6989
    • affected MT6990
    • affected MT6991
    • affected MT6993
    • affected MT8668
    • affected MT8673
    • affected MT8675
    • affected MT8676
    • affected MT8678
    • affected MT8755
    • and 12 more

References

References1

Sources

The same CVE in the primary databases and aggregators, to check against.

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[![CVE-2026-20404](https://cveledger.app/badge/CVE-2026-20404.svg)](https://cveledger.app/cve/CVE-2026-20404)

Record last updated .