Security readout for executives and security teams
Plain-English summary
IBM Security Verify Bridge 1.0.5.0 has a certificate validation weakness that could let a local, low-privileged attacker obtain limited sensitive information. The disclosed impact is low, but it may help an attacker plan further activity on the same system.
Executive priority
Treat as a low-priority remediation item unless the bridge runs on sensitive identity infrastructure or hosts with broad local user access. Address through normal patch governance and access review.
Technical view
The issue is improper certificate validation in IBM Security Verify Bridge 1.0.5.0. CVSS 3.0 is 2.5 with local attack vector, low privileges required, high complexity, no user interaction, low confidentiality impact, and no integrity or availability impact.
Likely exposure
Exposure appears limited to environments running IBM Security Verify Bridge version 1.0.5.0 where an attacker already has local access. The bundle does not identify other affected versions or products.
Exploitation context
The CVE is not listed as KEV in the provided data. The CVSS temporal vector marks exploit maturity as unproven. No cited source in the bundle states active exploitation.
Researcher notes
The public bundle does not provide a CWE, detailed failure mode, or exploit procedure. Analysis should stay focused on version confirmation, certificate validation behavior, local access assumptions, and IBM’s official remediation guidance.
Mitigation direction
- Check IBM advisory guidance for the supported fixed or replacement version.
- Upgrade or remediate IBM Security Verify Bridge 1.0.5.0 per IBM guidance.
- Restrict local interactive and service account access on affected hosts.
- Review certificate handling and sensitive data exposure around the bridge component.
Validation and detection
- Inventory IBM Security Verify Bridge deployments and installed versions.
- Confirm whether version 1.0.5.0 is present in production or support environments.
- Review IBM X-Force ID 196355 and IBM support advisory details.
- Verify local user access is limited to required administrators and services.
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.
CVE-2021-20435 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
- Low
- CVSS
- 2.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/S:U/AV:L/PR:L/AC:H/A:N/C:L/UI:N/I:N/RC:C/RL:O/E:U
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:3.0/S:U/AV:L/PR:L/AC:H/A:N/C:L/UI:N/I:N/RC:C/RL:O/E:U11.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
2.5LowVector: CVSS:3.0/S:U/AV:L/PR:L/AC:H/A:N/C:L/UI:N/I:N/RC:C/RL:O/E:U
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/6491651CVE reference · x_refsource_CONFIRM
- ibm-svb-cve202120435-info-disc (196355)CVE reference · vdb-entry, x_refsource_XF
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.