What is CVE-2026-21366?

CVE-2026-21366 is a high-severity vulnerability in Qualcomm Lemansau, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-04.

How severe is CVE-2026-21366?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Qualcomm Lemansau

CVE-2026-21366

Memory corruption while processing a packet with a size close to the maximum allowed value.

Vulnerability class: Integer Overflow

EPSS: 0.001 (0.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qualcomm Lemansau
Qualcomm Lemansau_firmware
Qualcomm Lemans_au_lgit
Qualcomm Lemans_au_lgit_firmware
Qualcomm Qam8255p
Qualcomm Qam8255p_firmware
Qualcomm Qam8295p
Qualcomm Qam8295p_firmware
Qualcomm Qam8620p
Qualcomm Qam8620p_firmware

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

product-security@qualcomm.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-21366?: CVE-2026-21366 is a high-severity vulnerability in Qualcomm Lemansau, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-04.
How severe is CVE-2026-21366?: High severity. CVSS v3 base score is 7.8 out of 10.