CVE-2026-20797

critical

Published 2026-02-27 · Modified 2026-05-10

CVSS v3

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2

—

VIR risk

9.8

Description

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.

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json
https://webapps.copeland.com/Dixell/Pages/SystemSoftwareUpdate
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10

CWEs

CWE-787 CWE-121

Verify integrity in audit chain (admin only). AS-IS.