Security readout for executives and security teams
Plain-English summary
Atomic Alarm Clock 6.3 has a memory corruption flaw that can let a local attacker run code through a crafted Time Zones Clock display name. This is high risk on machines where the application is installed, but the sources do not show internet-based exploitation or confirmed active exploitation.
Executive priority
Prioritize removal or remediation on managed endpoints where Atomic Alarm Clock 6.3 is installed. The business urgency is high for exposed workstations because exploitation could give code execution, but scope is likely narrow unless the software is widely deployed.
Technical view
The issue is a CWE-121 stack overflow in Atomic Alarm Clock 6.3. A malicious string in the Time Zones Clock display name textbox can overwrite structured exception handling and enable code execution with the application’s privileges. The CVSS 4.0 score is 8.6 with local attack vector and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure appears limited to endpoints running Drive-software Atomic Alarm Clock 6.3. The source bundle provides no CPEs, supported-version matrix, or server-side exposure path. Because this is a desktop utility, validate through endpoint software inventory, not external scanning.
Exploitation context
A public ExploitDB entry is cited, so proof-of-concept exploit information exists. However, the CVE is not marked KEV, and the supplied sources do not claim active exploitation in the wild. Treat it as locally exploitable code execution risk, not confirmed widespread exploitation.
Researcher notes
Evidence supports Atomic Alarm Clock 6.3 only. The source bundle cites SEH overwrite and SafeSEH bypass context but does not provide vendor remediation details, CPEs, or active exploitation evidence. Avoid expanding affected versions without vendor confirmation.
Mitigation direction
- Inventory endpoints for Atomic Alarm Clock 6.3.
- Remove the application where there is no business need.
- Check Drive-software or vendor guidance for patch or upgrade status.
- Run the application only under least-privileged user accounts.
- Monitor affected endpoints for suspicious child processes or command execution.
Validation and detection
- Confirm installed Atomic Alarm Clock versions through endpoint inventory.
- Prioritize systems where untrusted local users can access the application.
- Review EDR telemetry for unusual process launches from the application.
- Track CVE, VulnCheck, and vendor records for remediation updates.
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-121: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-37221 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
- 8.6 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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.
SSVC decision data
CVSS vector scores
2 official scoresWe 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:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.55.9VulnCheckVulnerability scoring details
Base CVSS 4.0 score
8.6HighVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Base CVSS 3.1 score
8.4HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- ExploitDB-48346CVE reference, VulnCheck · exploit
- VulnCheck Advisory: Atomic Alarm Clock 6.3 Stack Overflow via SEH UnicodeCVE reference, VulnCheck · third-party-advisory
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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.