How severe is CVE-2021-22741?

CVE-2021-22741 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22741 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22741?

CVE-2021-22741 primarily affects Schneider-electric Clearscada. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22741?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-22741 published?

CVE-2021-22741 was published on 2021-05-26 and last updated on 2026-06-17.

CVE-2021-22741

CVE-2021-22741 is a medium-severity vulnerability in Schneider-electric Clearscada with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-916.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 4.6
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-916
Affected product: Schneider-electric Clearscada
Published: 2021-05-26
Last modified: 2026-06-17

Description

Use of Password Hash with Insufficient Computational Effort vulnerability exists in ClearSCADA (all versions), EcoStruxure Geo SCADA Expert 2019 (all versions), and EcoStruxure Geo SCADA Expert 2020 (V83.7742.1 and prior), which could cause the revealing of account credentials when server database files are available. Exposure of these files to an attacker can make the system vulnerable to password decryption attacks. Note that “.sde” configuration export files do not contain user account password hashes.

Frequently asked questions

What is CVE-2021-22741?: Use of Password Hash with Insufficient Computational Effort vulnerability exists in ClearSCADA (all versions), EcoStruxure Geo SCADA Expert 2019 (all versions), and EcoStruxure Geo SCADA Expert 2020 (V83.7742.1 and prior), which could cause the revealing of account credentials when server database files are available. Exposure of these files to an attacker can make the system vulnerable to password decryption attacks. Note that “.sde” configuration export files do not contain user account password hashes.
How severe is CVE-2021-22741?: CVE-2021-22741 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22741 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22741?: CVE-2021-22741 primarily affects Schneider-electric Clearscada. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22741?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22741 published?: CVE-2021-22741 was published on 2021-05-26 and last updated on 2026-06-17.

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-130-07

Affected products (3)

cpe:2.3:a:schneider-electric:clearscada:*:*:*:*:*:*:*:*
cpe:2.3:a:schneider-electric:ecostruxure_geo_scada_expert_2019:*:*:*:*:*:*:*:*
cpe:2.3:a:schneider-electric:ecostruxure_geo_scada_expert_2020:*:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Clearscada

CVE-2019-6854 — High (CVSS 7.8): A CWE-287: Improper Authentication vulnerability exists in a folder within EcoStruxure Geo SCADA Expert (ClearSCADA)…
CVE-2022-24321 — High (CVSS 7.5): A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists that could cause Denial of Service…
CVE-2022-24318 — High (CVSS 7.5): A CWE-326: Inadequate Encryption Strength vulnerability exists that could cause non-encrypted communication with the…
CVE-2017-6021 — High (CVSS 7.5): In Schneider Electric ClearSCADA 2014 R1 (build 75.5210) and prior, 2014 R1.1 (build 75.5387) and prior, 2015 R1 (build…
CVE-2022-24320 — Medium (CVSS 5.9): A CWE-295: Improper Certificate Validation vulnerability exists that could allow a Man-in-theMiddle attack when…
CVE-2022-24319 — Medium (CVSS 5.9): A CWE-295: Improper Certificate Validation vulnerability exists that could allow a Man-in-theMiddle attack when…

All CVEs affecting Schneider-electric Clearscada →

Other CWE-916 vulnerabilities

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CVE-2026-30789 — Critical (CVSS 9.8): Use of Password Hash With Insufficient Computational Effort, Improper Restriction of Excessive Authentication Attempts…
CVE-2024-5743 — Critical (CVSS 9.8): An attacker could exploit the 'Use of Password Hash With Insufficient Computational Effort' vulnerability in EveHome…
CVE-2021-36767 — Critical (CVSS 9.8): In Digi RealPort through 4.10.490, authentication relies on a challenge-response mechanism that gives access to the…
CVE-2021-32519 — Critical (CVSS 9.8): Use of password hash with insufficient computational effort vulnerability in QSAN Storage Manager, XEVO, SANOS allows…
CVE-2019-17216 — Critical (CVSS 9.8): An issue was discovered on V-Zug Combi-Steam MSLQ devices before Ethernet R07 and before WLAN R05. Password…

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