🛡️ CVE-2026-21384 — fastconnect-6700-firmware

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability low.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: Low — an ordinary user account is enough.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Changed — a successful attack reaches components beyond the vulnerable one.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: Low — limited, and the attacker does not choose what is affected.
• Availability impact: Low — limited, and the attacker does not choose what is affected.

Weakness class

CVE-2026-21384 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2026-21384 is recorded against 79 packages.

• fastconnect-6700-firmware
• fastconnect-6900-firmware
• fastconnect-7800-firmware
• lemans-au-lgit-firmware
• lemansau-firmware
• netrani-firmware
• pandeiro-firmware
• qam8255p-firmware
• qamsrv1h-firmware
• qamsrv1m-firmware
• qca6595-firmware
• qca6595au-firmware
• qca6678aq-firmware
• qca6698aq-firmware
• qca6698au-firmware
• qca6797aq-firmware
• qcm4490-firmware
• qcm5430-firmware
• qcm6490-firmware
• qcm8838-firmware
• qcs4490-firmware
• qcs8550-firmware
• qln1083bd-firmware
• qln1086bd-firmware

Timeline and source

Published on 6 July 2026 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

docs.qualcomm.com

Other advisories for this package

fastconnect-6700-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-24080 (7.8 High, published 4 Aug 2026)
• CVE-2026-24079 (8.1 High, published 4 Aug 2026)
• CVE-2026-24078 (6.5 Medium, published 4 Aug 2026)
• CVE-2026-24077 (6.5 Medium, published 4 Aug 2026)
• CVE-2026-25292 (7.6 High, published 4 Aug 2026)
• CVE-2026-24076 (6.7 Medium, published 4 Aug 2026)
• CVE-2026-25289 (9.6 Critical, published 4 Aug 2026)
• CVE-2026-24084 (7.5 High, published 4 Aug 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-787: Out-of-bounds Write) in other software:

• CVE-2017-12606 (8.0 High, published 9 Jul 2026)
• CVE-2019-5063 (8.0 High, published 9 Jul 2026)
• CVE-2017-12605 (8.0 High, published 9 Jul 2026)
• CVE-2022-29208 (8.0 High, published 9 Jul 2026)
• CVE-2022-23561 (8.0 High, published 9 Jul 2026)
• CVE-2019-9423 (8.0 High, published 9 Jul 2026)
• CVE-2018-5268 (published 9 Jul 2026)
• CVE-2017-12603 (8.0 High, published 2 Jul 2026)

Details

Affected Packages

References