Security readout for executives and security teams
Plain-English summary
HCL Verse for Android used an APK signing key length that was too weak in versions before 12.0.15. If abused, an attacker could present a maliciously modified app as if it had the same signature. The main business risk is unauthorized app modification affecting trust and integrity, not data theft by itself.
Executive priority
Treat this as a moderate mobile application integrity issue. Prioritize remediation for managed Android fleets using HCL Verse, especially where mobile app governance is loose. It is not currently supported as an actively exploited emergency in the provided sources.
Technical view
CVE-2020-4099 is a CWE-326 insufficient cryptographic strength issue in HCL Verse for Android before 12.0.15. The source states the APK was signed with a key length less than or equal to 1024 bits, potentially allowing forged digital signatures after malicious app modification. CVSS 3.1 is 5.9 with high integrity impact and high attack complexity.
Likely exposure
Exposure is limited to organizations with HCL Verse for Android versions earlier than 12.0.15 deployed or available on Android devices. Risk is higher where mobile app inventory, approved app sourcing, or version enforcement is weak.
Exploitation context
The source bundle does not show active exploitation, and the CVE is not marked KEV. The CVSS vector indicates network attack path, no privileges or user interaction, but high attack complexity. Evidence supports potential signature forgery, not confirmed real-world attacks.
Researcher notes
The core evidence is the weak APK signing key length and affected version boundary. Do not assume broader HCL products are affected. Public details do not provide exploit telemetry, proof-of-concept status, or complete remediation instructions beyond the HCL advisory and version threshold.
Mitigation direction
- Upgrade HCL Verse for Android to version 12.0.15 or later.
- Use HCL advisory KB0100861 to confirm the fixed release guidance.
- Remove or replace HCL Verse for Android versions earlier than 12.0.15.
- Check current HCL guidance if upgrade status or platform coverage is unclear.
Validation and detection
- Inventory Android devices for HCL Verse for Android installations.
- Flag any installed version earlier than 12.0.15.
- Confirm managed app catalogs publish only fixed HCL Verse builds.
- Review HCL KB0100861 for any additional validation notes.
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-326: 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-2020-4099 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
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
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:H/PR:N/UI:N/S:U/C:N/I:H/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0100861CVE reference
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.
Inadequate Encryption Strength
Inadequate Encryption Strength represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.