CVE-2026-27748 json
Avira Internet Security Arbitrary File Deletion via Improper Link Resolution
published 2026-03-05 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-9820
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Gen Digital Inc. Avira Internet Security 1.1.114.3113
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
Affected products
- Gen Digital Inc. Avira Internet Security
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
-
gendigital.com
/us/en/contact-us/security-advisories/
vendor-advisory
-
support.avira.com
/hc/en-us/articles/360010656158-Current-Avira-versions
release-notes
-
avira.com
/en/internet-security
product
Sources
- CVE List CVE-2026-27748
- NVD CVE-2026-27748
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