The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested…
Priority MEDIUM 47CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
The bencoding parser in BitTorrent uTorrent through 3.5.5 (build 45505) misparses nested bencoded dictionaries, which allows a remote attacker to cause a denial of service.
Why it matters now
EPSS 0.12042 96th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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:bittorrent:utorrent:*:*:*:*:*:*:*:* | up to 3.5.5 | Vulnerable | Bittorrent |
- cpe:2.3:a:bittorrent:utorrent:*:*:*:*:*:*:*:* Versions up to 3.5.5 Vulnerable ·Bittorrent
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-8437
- 2026-10-03 Alias added: GHSA-f77w-22mg-cg9g
References
More Bittorrent Utorrent vulnerabilities
- TI-2018-15271 uTorrent Guest Account privileges management CVSS 3.1HIGH 8.8
- TI-2018-15270 uTorrent PRNG improper authentication CVSS 3.1HIGH 8.8
- TI-2018-15269 uTorrent memory corruption CVSS 3.1HIGH 8.8
Sources
- CVE-2020-8437 · CVE Program
- CVE-2020-8437 · NVD
- FIRST EPSS
- GHSA-f77w-22mg-cg9g · 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