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Fencer Vulns
medium 5.5

CVE-2021-22809 json

A CWE-125:Out-of-Bounds Read vulnerability exists that could cause unintended data disclosure when a malicious *.gd1 configuration file is…

published 2022-01-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9944

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

A CWE-125:Out-of-Bounds Read vulnerability exists that could cause unintended data disclosure when a malicious *.gd1 configuration file is loaded into the GUIcon tool. Affected Product: Eurotherm by Schneider Electric GUIcon Version 2.0 (Build 683.003) and prior

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-313-02 updated cvss 4.4

Schneider Electric GUIcon

  • Schneider Electric Software, LLC GUIcon <= 2.0 (Build 683.003)
    affected: vendor fix, mitigation “For more information about these issues, please refer to the original Schneider Electric publication SEVD-2021-313-07” download.schneider-electric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.