Is CVE-2026-20797 actively exploited?

No active exploitation of CVE-2026-20797 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20797 be exploited remotely?

Yes. CVE-2026-20797 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20797?

CVE-2026-20797 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2026-20797

CRITICAL

CVE-2026-20797

Published: February 27, 2026· Updated: Feb 27, 2026

9.8

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:17.0th

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.

NVD Source

Technical Analysis

CVE-2026-20797 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

copeland6 products

xweb 300d pro firmwarexweb 300d proxweb 500d pro firmwarexweb 500d proxweb 500b pro firmwarexweb 500b pro

Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-10.json

ADVISORYhttps://www.cisa.gov/news-events/ics-advisories/icsa-26-057-10

News & Research Mentioning CVE-2026-20797

Copeland XWEB and XWEB Pro

CISA Alerts· Feb 26, 2026

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to bypass authentication, cause a denial-of-service condition, cause memory corruption, and execute arbitrary code. The following versions of Copeland XWEB and XWEB Pro are affected: XWEB 300D PRO <=1.12.1 (CVE-2026-25085, CVE-2026-21718, CVE-2026-24663, CVE-2026-21389, CVE-2026-25111, CVE-2026-20742, CVE-2026-24517, CVE-2026-25195, CVE-2026-20910, CVE-2026-24689, CVE-2026-25109, CVE-2026-20902, CVE-2026-24695, CVE-2026-25105, CVE-2026-24452, CVE-2026-23702, CVE-2026-25721, CVE-2026-20764, CVE-2026-25196, CVE-2026-25037, CVE-2026-22877, CVE-2026-20797, CVE-2026-3037) XWEB 500D PRO <=1.12.1 (CVE-2026-25085, CVE-2026-21718, CVE-2026-24663, CVE-2026-21389, CVE-202 [xlite_meta score:69 src:CISA Alerts xlite_fp:3a174986454bd0c7cf4f73b3a9d9924250e5f4c21a35442f9444ece8844eacee]