CVE-2026-20557 Modem - Privilege Escalation

Modem contains an out of bounds write caused by missing bounds check, letting remote attackers escalate privileges if UE connects to a rogue base station, exploit requires connection to rogue base station.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2 November 2026
Updated
3 November 2026
Weakness
CWE-787

Vendor fix

Update to the latest version with Patch ID MOLY01877236 applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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