Cyber Resilience

CVE-2023-43535

Qualcomm Fastconnect 6700 Firmware

Published
06 February 2024
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 8.4
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0011 2th percentile
Risk Priority 58 floored blend · peak EPSS

Summary

CVE-2023-43535 is a high-severity Improper Validation of Array Index (CWE-129) vulnerability in Qualcomm Fastconnect 6700 Firmware. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

Memory corruption when negative display IDs are sent as input while processing DISPLAYESCAPE event trigger.

CWE(s)
CWE-129

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1211 Exploitation for Stealth Stealth
Adversaries may exploit vulnerabilities to evade detection by hiding activity, suppressing logging, or operating within trusted or unmonitored components.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-45550Same product: Qualcomm Fastconnect 6900
CVE-2025-21447Same product: Qualcomm Fastconnect 6900
CVE-2023-43532Same product: Qualcomm Fastconnect 6700
CVE-2024-49836Same product: Qualcomm Fastconnect 6900
CVE-2024-49832Same product: Qualcomm Fastconnect 6900
CVE-2025-21423Same product: Qualcomm Fastconnect 6700
CVE-2024-45582Same product: Qualcomm Fastconnect 6900
CVE-2023-33078Same product: Qualcomm Fastconnect 6700
CVE-2026-25276Same product: Qualcomm Fastconnect 6700
CVE-2024-49843Same product: Qualcomm Fastconnect 7800

Affected Assets

qualcomm
fastconnect 6700 firmware
all versions
qualcomm
fastconnect 6900 firmware
all versions
qualcomm
fastconnect 7800 firmware
all versions
qualcomm
sc8380xp firmware
all versions
qualcomm
snapdragon 7c\+ gen 3 compute firmware
all versions
qualcomm
snapdragon 8cx gen 3 compute platform firmware
all versions
qualcomm
wcd9380 firmware
all versions
qualcomm
wcd9385 firmware
all versions
qualcomm
wsa8830 firmware
all versions
qualcomm
wsa8835 firmware
all versions
+3 more product configuration(s) — see NVD for full list

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input validation and bounds checking that prevent improper array indexing.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect out-of-bounds array access but does not prevent the weakness by itself.

A.8.25 Secure development life cycle partial match
prevents

Secure development lifecycle mandates input validation and bounds checking that directly prevents improper array indexing.

A.8.26 Application security requirements partial match
prevents

Application security requirements include validation of untrusted input used for indexing or addressing memory structures.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage defensive coding patterns that reduce index-related vulnerabilities.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly require bounds checking and validation of array indices derived from untrusted data.

References