CVE-2026-43835
Firmware Integrity Bypass in Device Firmware Upgrade Functionality
Description
A vulnerability in the firmware upgrade functionality could allow an authenticated attacker to upload a forged firmware upgrade file, potentially compromising the device permanently.
INFO
Published Date :
Oct. 20, 2026, 8:16 a.m.
Last Modified :
Oct. 20, 2026, 8:16 a.m.
Remotely Exploit :
Yes !
Source :
5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4 | ||||
| CVSS 4.0 | HIGH | 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4 |
Solution
- Validate firmware signatures before applying upgrades.
- Restrict firmware uploads to authorized administrative accounts.
- Ensure firmware integrity checks are performed.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43835.
| URL | Resource |
|---|---|
| https://www.advantech.com/en/security-advisory | |
| https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43835 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43835
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43835 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43835 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 5f57b9bf-260d-4433-bf07-b6a79e9bb7d4
Oct. 20, 2026
Action Type Old Value New Value Added Description A vulnerability in the firmware upgrade functionality could allow an authenticated attacker to upload a forged firmware upgrade file, potentially compromising the device permanently. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/43xxx/CVE-2026-43835.json">CVE-2026-43835</a> Added Reference https://www.advantech.com/en/security-advisory Added Reference https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-149