Vulnerability · CVE-2026-43838
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Published Oct 20, 2026 · catalog updated Oct 20, 2026 · Advantech
Last checked Nov 3, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-43838. EPSS is 0.38%. Act only if a listed version of Advantech is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Critical9.2
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.38%
- Remediation
- Advisory link
- Affected products
- vendor Advantech
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Advantechversion unspecified
How to fix CVE-2026-43838
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-43838. EPSS is 0.38%. Act only if a listed version of Advantech is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-121: Stack-based Buffer Overflow. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 20, 2026 · NIST NVD
Detected
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Oct 20, 2026 · EUVD
Updated
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Oct 20, 2026 · NIST NVD
Updated
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Oct 20, 2026 · NIST NVD
Updated
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
Sources
- CVE.orgVulnerability recordCVE-2026-43838
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-43838
30-day exploitation probability 0.38%
first.org - EUVDVulnerability recordEUVD-2026-104837
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
euvd.enisa.europa.eu - NIST NVDVulnerability recordCVE-2026-43838
A stack-based buffer overflow vulnerability in the login functionality could allow an attacker to achieve code execution.
nvd.nist.gov
References
Freshness
Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 31, 2026
- CVE.orgOct 21, 2026
- NIST NVDOct 21, 2026
- EUVDOct 20, 2026