An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14.
Priority MEDIUM 46CWE-191Published · 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 · NVD. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.
Summary
An integer underflow has been identified in the unicode_to_utf8() function in tnef 1.4.14. This might lead to invalid write operations, controlled by an attacker.
Why it matters now
EPSS 0.01934 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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:tnef_project:tnef:1.4.14:*:*:*:*:*:*:* | 1.4.14 | Vulnerable | Tnef Project |
- cpe:2.3:a:tnef_project:tnef:1.4.14:*:*:*:*:*:*:* Versions 1.4.14 Vulnerable ·Tnef Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-8911
- 2026-10-03 Alias added: GHSA-575j-8r4j-2fmq
References
Advisory 2
More Tnef Project Tnef vulnerabilities
- TI-2017-04142 An issue was discovered in tnef before 1.4.13. CVSS 3.0HIGH 7.8
- TI-2017-04141 An issue was discovered in tnef before 1.4.13. CVSS 3.0HIGH 7.8
- TI-2017-04140 An issue was discovered in tnef before 1.4.13. CVSS 3.0HIGH 7.8
- TI-2017-04139 An issue was discovered in tnef before 1.4.13. CVSS 3.0HIGH 7.8
- TI-2026-65748 Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value CVSS 3.1HIGH 8.1
- TI-2026-65750 Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation CVSS 3.1MEDIUM 6.5
Sources
- CVE-2017-8911 · CVE Program
- CVE-2017-8911 · NVD
- FIRST EPSS
- GHSA-575j-8r4j-2fmq · GitHub Advisory Database · CC BY 4.0
- CVE-2017-8911 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences