Vulnerability · Published Feb 27, 2026 · Assigned by icscert
CVE-2026-20797Copeland XWEB and XWEB Pro Stack-based Buffer Overflow
Medium 4.3
In plain English
A medium-severity stack buffer overflow in Copeland XWEB 300D PRO from Copeland. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.8%top 42.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Copeland | Copeland XWEB 300D PRO | 0 – through 1.12.1 |
| Copeland | Copeland XWEB 500D PRO | 0 – through 1.12.1 |
| Copeland | Copeland XWEB 500B PRO | 0 – through 1.12.1 |
Weakness: CWE-121 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L