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CVE-2026-20563In Modem, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote denial of service, if a UE…

Description

In Modem, there is a possible out of bounds write due to an incorrect 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: MOLY01777997; Issue ID: MSV-8905.

Timeline

  1. ID reserved

    By MediaTek

  2. · 12 months later

    Published

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-2026-20563, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Medium5.3CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Awaiting Analysis3.1Medium5.3CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.22% · top 88% of all CVEs (14 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 5.3.

Affected products

  • MediaTek, Inc. · MediaTek chipset

    • affected MT2716
    • affected MT2735
    • affected MT2737
    • affected MT6779
    • affected MT6781
    • affected MT6783
    • affected MT6785
    • affected MT6789
    • 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 MT6881
    • 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 MT6982
    • affected MT6983
    • affected MT6985
    • affected MT6986
    • affected MT6988
    • affected MT6989
    • and 22 more

References

References1

Sources

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

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Record last updated .