CVE-2021-22799

LOWNVD 3.83.8—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 85% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
3.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 3.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

CVSS v3
3.8
EG Score
3.8(medium)
EG Risk
—
EPSS
14.8%
KEV
Not listed

Published

January 28, 2022

Last Modified

November 21, 2024

References (2)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:44 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
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  72. 2026-05-26 04:02 UTCEG score recompute
  73. 2026-05-26 04:02 UTCGHSA enrichment
  74. 2026-05-24 16:49 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-22799?
CVE-2021-22799 is a low vulnerability published on January 28, 2022. 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
When was CVE-2021-22799 disclosed?
CVE-2021-22799 was first published in the National Vulnerability Database on January 28, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-22799 actively exploited?
CVE-2021-22799 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-22799?
CVE-2021-22799 has a CVSS v3 base score of 3.8 (NVD).
How do I remediate CVE-2021-22799?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22799, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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