Vulnerability Description
Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Avira | Internet Security | < 1.1.114.3113 |
Related Weaknesses (CWE)
References
- https://support.avira.com/hc/en-us/articles/360010656158-Current-Avira-versionsRelease Notes
- https://www.avira.com/en/internet-securityProduct
- https://www.gendigital.com/us/en/contact-us/security-advisories/
FAQ
What is CVE-2026-27748?
CVE-2026-27748 is a vulnerability with a CVSS score of 7.8 (HIGH). Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\...
How severe is CVE-2026-27748?
CVE-2026-27748 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27748?
Check the references section above for vendor advisories and patch information. Affected products include: Avira Internet Security.