CVE-2021-22799

lowpriority · track · 15EPSS 0.002 · 15 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (15th) EPSS

CVSS 2.1 · low

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-28

A CWE-331: Insufficient Entropy vulnerability exists that could cause unintended connection from an internal network to an external network when an attacker manages to decrypt the SESU proxy password from the registry. Affected Product: Schneider Electric Software Update, V2.3.0 through V2.5.1

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationSchneider Electric Software Updatecisa_csaf_ot
If SESU is installed (assuming SESU is configured as “managed product” inside the SESU application) it will indicate a security update is available. Click to download and install the new SESU version.

cvss

Technical severity, 0–10. One row per scoring source.

3.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.02.1lowAV:L/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 2.9

v3.13.8lowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Nprimary · NVD / NIST USexploitability 2 · impact 1.4

v3.03.8lowCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:Nsecondary · CISA US

v3.13.5lowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-331USprimaryCWE-331US

affected products (4)

Products and version ranges known to be affected.

Schneider Electric Software Update: v2.3.0 through v2.5.1all versionscisa_csaf_otUS
Schneider Electric Software, LLC Schneider Electric Software Update2.3.0 | → 2.5.1cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
schneider-electric software update2.3.0 → 2.5.2nvdUScpe:2.3:a:schneider-electric:software_update:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-21-336-01Schneider Electric SESU2021-12-02icsa · cisa_csaf_otUS
Successful exploitation of this vulnerability could cause unintended connection from an internal network to an external network.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2022-01-28modified 2026-06-17

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references (7)

External citations — patches, advisories, analysis.

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