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01 Record

CVE-2026-43835

A vulnerability in the firmware upgrade functionality could allow an authenticated attacker to upload a forged firmware upgrade file, potentially compromising the device permanently.

HighPUBLISHEDCNA: CSA
CNA base score8.6 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

02 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.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.18% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 7.9% of scored records. A rank, not a probability.
NVD base score
8.6 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/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
NVD analysis status
Deferred. NVD last modified this record on 2026-10-20.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-20 08:02Z9 DAYS AGO
Last updated
2026-10-20 15:52Z9 DAYS AGO
Reserved
2026-05-04
Assigning CNA
CSA
Record state
PUBLISHED
Severity
High (CVSS 8.6)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weaknesses
  • CWE-345Insufficient Verification of Data AuthenticityClass
Data version
5.2
Document digest
454b58490478949a884ea5752b3461d077125353aa3d14e0fa82ecd0044e81fd

05 Affected products

VendorProductVersionsPlatforms
AdvantechADAM-3600prior to version 2.8.5.0—

06 References

07 Remediation

Advantech has released a security update to address these vulnerabilities. Users and administrators of affected product versions are advised to update to the latest version immediately.