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01 Record

CVE-2026-27749

Avira Internet Security System Speedup Insecure Deserialization

HighPUBLISHEDCNA: VulnCheck
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

02 Description

Avira Internet Security System Speedup Insecure Deserialization

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.33% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 26.6% of scored records. A rank, not a probability.
NVD base score
7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-03-05 14:15Z7 MO AGO
Last updated
2026-04-01 14:38Z7 MO AGO
Reserved
2026-02-23
Assigning CNA
VulnCheck
Record state
PUBLISHED
Severity
High (CVSS 7.8)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-502Deserialization of Untrusted DataBase
Data version
5.2
Document digest
76d862bb0f595023a872b9d46af0769fa830810731a0e7d45dabf4d883322950

05 Affected products

VendorProductVersionsPlatforms
Gen Digital Inc.Avira Internet Security0 to 1.1.109.1990Windows

06 References

07 Remediation

Upgrade Avira Internet Security for Windows to version 1.1.114.3113 or later. Apply updates through the product's built-in updater or a fresh install from the vendor; see the release-notes reference in this record for current supported versions.