01 Record

CVE-2021-32977

AVEVA System Platform Improper Verification of Cryptographic Signature

HighPUBLISHEDCNA: icscert

CNA base score7.2 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

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02 Description

AVEVA System Platform Improper Verification of Cryptographic Signature

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.64% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 50.6% of scored records. A rank, not a probability.

NVD base score

7.2 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2022-04-04 19:45Z4 YR AGO

Last updated

2025-04-16 17:57Z1 YR AGO

Reserved

2021-05-13

Assigning CNA

icscert

Record state

PUBLISHED

Severity

High (CVSS 7.2)

CNA CVSS vector

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

Weaknesses

CWE-347Improper Verification of Cryptographic SignatureBase

Data version

5.1

Document digest

675765c1d3a554d4ac15d1e1ee06c2ca655b8aea28a1176ba059851a07b80714

05 Affected products

VendorProductVersionsPlatforms

AVEVAAVEVA System Platform2017 to 2020 R2 P01—

06 References

www.cisa.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-21-180-05x_refsource_CONFIRM
www.aveva.comhttps://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin_AVEVA-2021-002.pdfx_refsource_CONFIRM

07 Remediation

AVEVA recommends organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation. AutoBuild service is intended to be used only on the GR Node of System Platform during configuration. If the AutoBuild service is enabled on any Runtime nodes, it should be disabled. Furthermore, if the AutoBuild functionality is not used on the GR Node, the AutoBuild service can be disabled on the GR Node as an alternative mitigation that does not require patching. AVEVA recommends users who need to continually use the AutoBuild functionality and cannot disable it in System Platform Versions 2017 through 2020 R2 P01 (inclusive) are affected by the vulnerabilities and should first upgrade to one of the System Platform versions listed below, then apply the corresponding security update: System Platform 2020 R2 P01, 2020 R2, 2020: Apply AVEVA Communication Drivers Pack 2020 R2.1 System Platform 2017 U3 SP1 P01: First apply AVEVA Communication Drivers Pack 2020 R2 AVEVA notes that Activated Licensing is required to apply AVEVA Communication Drivers Pack 2020 R2 on top of System Platform 2017 U3 SP1 P01. For information on AVEVA license compatibility, please contact AVEVA Customer Support. Then apply AVEVA Communication Drivers Pack 2020 R2.1 Please see AVEVA’s security bulletin AVEVA-2021-002 for more information.