CVE-2020-8437
CVE-2020-8437 is a high-severity vulnerability in Bittorrent Utorrent with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 12% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-476.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 12% (96th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-476
- Affected product: Bittorrent Utorrent
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2020-8437?
- 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.
- How severe is CVE-2020-8437?
- CVE-2020-8437 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2020-8437 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 12% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-8437?
- CVE-2020-8437 affects Bittorrent Utorrent. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-8437?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-8437 published?
- CVE-2020-8437 was published on 2020-03-02 and last updated on 2026-06-17.
References
- https://blog.whtaguy.com/2020/09/utorrent-cve-2020-8437-vulnerability.html
- https://forum.utorrent.com/forum/13-announcements/
- https://twitter.com/va_start
- https://utclient.utorrent.com/offers/beta_release_notes/release_notes.html
Affected products (1)
- cpe:2.3:a:bittorrent:utorrent:*:*:*:*:*:*:*:*
More vulnerabilities in Bittorrent Utorrent
- CVE-2018-25044 — Medium (CVSS 6.3): A vulnerability, which was classified as critical, has been found in uTorrent. This issue affects some unknown…
- CVE-2018-25043 — Medium (CVSS 5.0): A vulnerability classified as critical was found in uTorrent. This vulnerability affects unknown code of the component…
- CVE-2018-25042 — Medium (CVSS 5.0): A vulnerability classified as critical has been found in uTorrent. This affects an unknown part. The manipulation leads…
All CVEs affecting Bittorrent Utorrent →
Other CWE-476 (NULL Pointer Dereference) vulnerabilities
- CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
- CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
- CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
- CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
- CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
- CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…
Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →