OS command injection in Extra Innovation Inc. acmailer CGI
Priority MEDIUM 52CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
Improper neutralization of special elements used in an OS command ('OS Command Injection') issue exists in acmailer CGI ver.4.0.3 and earlier and acmailer DB ver.1.1.5 and earlier. If this vulnerability is exploited, an arbitrary OS command may be executed by an attacker.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01424 73rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Extra Innovation Inc. | acmailer CGI | ver.4.0.3 and earlier | — | No fix listed | CNA |
| Extra Innovation Inc. | acmailer DB | ver.1.1.5 and earlier | — | No fix listed | CNA |
- acmailer CGI VendorExtra Innovation Inc. Affected ver.4.0.3 and earlier Fixed in — No fix listed CNA
- acmailer DB VendorExtra Innovation Inc. Affected ver.1.1.5 and earlier Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-46686
- 2026-10-03 Alias added: GHSA-5mr4-h7fw-j3h9
References
More Extra Innovation Inc. vulnerabilities
- TI-2026-49188 Incorrect authorization in Extra Innovation Inc. acmailer CGI CVSS 4.0HIGH 8.7
- TI-2023-27190 Cross-site scripting in Extra Innovation Inc. acmailer CGI CVSS 3.0MEDIUM 6.1
- TI-2026-47132 A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script. CVSS 4.0MEDIUM 5.1
Sources
- CVE-2021-46686 · CVE Program
- CVE-2021-46686 · NVD
- FIRST EPSS
- GHSA-5mr4-h7fw-j3h9 · GitHub Advisory Database · CC BY 4.0
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