What is the CVSS score of CVE-2025-21438?

CVE-2025-21438 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-21438?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

Fastconnect 6200 Firmware CVE-2025-21438

HIGH

Out-of-bounds Read (CWE-125)

2025-04-07 product-security@qualcomm.com

7.8

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-125 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, read limits MITRE ATT&CK 1 technique across 1 tactic: Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 7.8 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.07%.
Exploit ScenarioDerived	A local attacker with access to the system could read data from memory outside the intended buffer boundaries.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 28, 2026

Memory corruption while IOCTL call is invoked from user-space to read board data. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Memory corruption while IOCTL call is invoked from user-space to read board data. Affected products include: Qualcomm Fastconnect 6200 Firmware, Qualcomm Fastconnect 6700 Firmware, Qualcomm Fastconnect 6900 Firmware, Qualcomm Fastconnect 7800 Firmware, Qualcomm Qca6164 Firmware.

Know when Fastconnect 6200 Firmware gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Memory corruption while IOCTL call is invoked from user-space to read board data.

Executive ViewAI

Why It Matters

Organizations using Memory corruption while IOCTL call face notable risk from CVE-2025-21438, a out-of-bounds read vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.1%

Top 79% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:o:qualcomm:fastconnect_6200_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:fastconnect_6700_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:fastconnect_6900_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:fastconnect_7800_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qca6164_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qca6174_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qca6174a_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qca6595au_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qca9377_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcm5430_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcm6490_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcn7605_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcn7606_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcs5430_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:qcs6490_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:video_collaboration_vc3_platform_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:sc8180x\+sdx55_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:sc8380xp_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:sm6250_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:qualcomm:snapdragon_7c_compute_platform_\(sc7180-ac\)_firmware:-:*:*:*:*:*:*:*

+ 23 more

More in Fastconnect 6200 Firmware

View all

CVE-2025-21480 HIGH Act Now

8.6 Jun 03

Qualcomm GPU micronode contains a memory corruption vulnerability (CVE-2025-21480, CVSS 8.6) caused by unauthorized comm

CVE-2025-21479 HIGH Act Now

8.6 Jun 03

A second Qualcomm GPU micronode memory corruption vulnerability (CVE-2025-21479, CVSS 8.6) exists in the unauthorized co

CVE-2026-21385 HIGH Act Now POC

7.8 Mar 02

A Qualcomm chipset vulnerability (CVE-2026-21385) causes memory corruption through improper integer handling during memo

CVE-2024-21480 CRITICAL Act Now

9.8 May 06

Memory corruption while playing audio file having large-sized input buffer. Rated critical severity (CVSS 9.8), this vul

CVE-2024-21463 CRITICAL Act Now

9.8 Apr 01

Memory corruption while processing Codec2 during v13k decoder pitch synthesis. Rated critical severity (CVSS 9.8), this

CVE-2023-22388 CRITICAL Act Now

9.8 Nov 07

Memory Corruption in Multi-mode Call Processor while processing bit mask API. Rated critical severity (CVSS 9.8), this v

CVE-2023-24855 CRITICAL Act Now

9.8 Oct 03

Memory corruption in Modem while processing security related configuration before AS Security Exchange. Rated critical s

CVE-2023-22385 CRITICAL Act Now

9.8 Oct 03

Memory Corruption in Data Modem while making a MO call or MT VOLTE call. Rated critical severity (CVSS 9.8), this vulner

CVE-2023-28562 CRITICAL Act Now

9.8 Sep 05

Memory corruption while handling payloads from remote ESL. Rated critical severity (CVSS 9.8), this vulnerability is rem

CVE-2023-21631 CRITICAL Act Now

9.8 Jul 04

Weak Configuration due to improper input validation in Modem while processing LTE security mode command message received

CVE-2023-33032 CRITICAL Act Now

9.3 Jan 02

Memory corruption in TZ Secure OS while requesting a memory allocation from TA region. Rated critical severity (CVSS 9.3

CVE-2023-33030 CRITICAL Act Now

9.3 Jan 02

Memory corruption in HLOS while running playready use-case. Rated critical severity (CVSS 9.3), this vulnerability is no

Same weakness CWE-125 – Out-of-bounds Read

View all

CVE-2014-0160 HIGH POC

7.5

CVE-2016-5198 HIGH POC

8.8

CVE-2025-5777 CRITICAL POC

9.3

CVE-2016-1646 HIGH POC

8.8

CVE-2017-5030 HIGH POC

8.8

CVE-2016-4523 HIGH

7.5

CVE-2024-48456 HIGH POC

7.5

CVE-2024-48457 HIGH POC

7.5

Same technique Buffer Overflow

View all

CVE-2017-7269 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2020-0796 CRITICAL POC

10.0

CVE-2019-11043 CRITICAL POC

9.8

CVE-2009-0927 HIGH POC

8.8

CVE-2012-1889 HIGH POC

8.8

References

Advisories & patches

ADVISORY https://docs.qualcomm.com/product/publicresources/securitybulletin/april-2025-bulletin.html

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back