A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a terminati…

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Feb 27, 2026 · NIST NVD

   Detected

   A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

2. Jun 17, 2026 · NIST NVD

   Updated

   A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

Affected

• cpe copeland/xweb 300d pro firmwareversion unspecified
• cpe copeland/xweb 500b pro firmwareversion unspecified
• cpe copeland/xweb 500d pro firmwareversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2026-20797

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-20797

  A stack based buffer overflow exists in an API route of XWEB Pro version 1.12.1 and prior, enabling unauthenticated attackers to cause stack corruption and a termination of the program.

  nvd.nist.gov

References

• Third Party Advisory · github.com
• Product · webapps.copeland.com
• Third Party Advisory · cisa.gov