An issue was discovered on atasm, version 1.09.
Priority MEDIUM 50CWE-787Published · 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 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An issue was discovered on atasm, version 1.09. A stack-buffer-overflow vulnerability in function aprintf() in asm.c allows attackers to execute arbitrary code on the system via a crafted file.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00739 54th 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:atasm_project:atasm:1.09:*:*:*:*:*:*:* | 1.09 | Vulnerable | Atasm Project |
- cpe:2.3:a:atasm_project:atasm:1.09:*:*:*:*:*:*:* Versions 1.09 Vulnerable ·Atasm Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34123
- 2026-10-03 Alias added: GHSA-vvwm-9cq7-j8mv
References
Advisory 1
More Atasm Project Atasm vulnerabilities
- TI-2019-14259 ATasm 1.06 has a stack-based buffer overflow in the get_signed_expression() function in… CVSS 3.1HIGH 7.8
- TI-2019-14258 ATasm 1.06 has a stack-based buffer overflow in the parse_expr() function in setparse.c via a crafted .m65 file. CVSS 3.1HIGH 7.8
- TI-2019-14257 ATasm 1.06 has a stack-based buffer overflow in the to_comma() function in asm.c via a crafted .m65 file. CVSS 3.1HIGH 7.8
Sources
- CVE-2021-34123 · CVE Program
- CVE-2021-34123 · NVD
- FIRST EPSS
- GHSA-vvwm-9cq7-j8mv · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences