CVE-2021-21786
A privilege escalation vulnerability exists in the IOCTL 0x9c406144 handling of IOBit Advanced SystemCare Ultimate 14.2.0.220.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A privilege escalation vulnerability exists in the IOCTL 0x9c406144 handling of IOBit Advanced SystemCare Ultimate 14.2.0.220. A specially crafted I/O request packet (IRP) can lead to increased privileges. An attacker can send a malicious IRP to trigger this vulnerability.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.29% probability · 22th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-782, CWE-269
- Affected
- iobit/advanced systemcare ultimate
- Source
- talos-cna@cisco.com
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1253Exploit, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1253Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.