Security readout for executives and security teams
Plain-English summary
This vulnerability can let a remote attacker crash or disrupt affected ABB control software communication. It is an availability issue, not a data theft issue, but in industrial control environments downtime can directly affect operations, safety margins, and recovery workload.
Executive priority
High for any site using affected ABB control platforms. The business concern is operational disruption, so prioritize confirmation of exposure, vendor remediation guidance, and compensating network controls before routine IT vulnerabilities.
Technical view
CVE-2021-22277 is an improper input validation flaw in ABB AC 800M MMS communication. The CVSS 3.1 vector is network reachable, low complexity, no privileges, no user interaction, with high availability impact and no stated confidentiality or integrity impact.
Likely exposure
Exposure is most likely in organizations running the listed ABB 800xA, AC 800M, Control Builder Safe, Compact Product Suite, or SoftControl versions where MMS communication is network reachable.
Exploitation context
The provided sources do not report active exploitation, and the bundle marks CISA KEV status as false. No exploit details are provided. Risk depends heavily on network reachability to affected ABB control-system communication paths.
Researcher notes
Evidence is limited to CVE metadata and ABB’s referenced advisory URL. The record identifies CWE-20 and affected product families but does not provide technical root-cause detail, exploit status, or a named fixed version in the supplied bundle.
Mitigation direction
- Identify whether listed ABB products and versions are deployed.
- Review ABB advisory 7PAA001499 for vendor-approved fixes or workarounds.
- Restrict control-system communication paths to trusted operational hosts only.
- Prioritize segmentation where MMS traffic is reachable from broader networks.
- Increase monitoring for controller communication failures or unexpected service disruption.
Validation and detection
- Inventory ABB product names and versions against the affected list.
- Confirm whether MMS communication is reachable from untrusted network zones.
- Review change records for ABB patches or mitigations tied to advisory 7PAA001499.
- Check operational logs for unexplained availability events in affected systems.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-22277 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://search.abb.com/library/Download.aspx?DocumentID=7PAA001499&LanguageCode=en&DocumentPartId=&Action=LaunchCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.