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Vulnerability record · CVE-2017-11121 · published 28 September 2017

CVE-2017-11121: Broadcom bcm4355c0 firmware memory buffer overflow vulnerability

Broadcom · Bcm4355c0 Firmware

On Broadcom BCM4355C0 Wi-Fi chips 9.44.78.27.0.1.56 and other chips, properly crafted malicious over-the-air Fast Transition frames can potentially trigger internal Wi-Fi firmware heap and/or stack overflows, leading to denial of service or other effects, aka B-V2017061205.

9.8 CVSS 3.0 Critical EPSS 2.8% · top 14.1% CWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 10.0
2.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
20References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

On Broadcom BCM4355C0 Wi-Fi chips 9.44.78.27.0.1.56 and other chips, properly crafted malicious over-the-air Fast Transition frames can potentially trigger internal Wi-Fi firmware heap and/or stack overflows, leading to denial of service or other effects, aka B-V2017061205.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/144329/Broadcom-802.11r-FT-Reassociation-Response-Overflows.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/100984 Third Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1291 ExploitIssue TrackingThird Party Advisory
https://lists.apple.com/archives/security-announce/2017/Sep/msg00007.html Mailing ListThird Party Advisory
https://lists.apple.com/archives/security-announce/2017/Sep/msg00009.html Mailing ListThird Party Advisory
https://source.android.com/security/bulletin/2017-09-01 Third Party Advisory
https://support.apple.com/HT208112 Third Party Advisory
https://support.apple.com/HT208113 Third Party Advisory
https://support.apple.com/en-us/HT208112 Third Party Advisory
https://support.apple.com/en-us/HT208113 Third Party Advisory
http://packetstormsecurity.com/files/144329/Broadcom-802.11r-FT-Reassociation-Response-Overflows.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/100984 Third Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1291 ExploitIssue TrackingThird Party Advisory
https://lists.apple.com/archives/security-announce/2017/Sep/msg00007.html Mailing ListThird Party Advisory
https://lists.apple.com/archives/security-announce/2017/Sep/msg00009.html Mailing ListThird Party Advisory
https://source.android.com/security/bulletin/2017-09-01 Third Party Advisory
https://support.apple.com/HT208112 Third Party Advisory
https://support.apple.com/HT208113 Third Party Advisory
https://support.apple.com/en-us/HT208112 Third Party Advisory
https://support.apple.com/en-us/HT208113 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-11121), CISA KEV, FIRST EPSS (scores of 2026-10-02). This page is refreshed as NVD updates the record.