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CVE-2026-27749

Avira Internet Security contains a deserialization of untrusted data vulnerability in the System Speedup component. The Avira.SystemSpeedup.RealTimeOptimizer.exe process, which runs with SYSTEM privileges, deserializes data from a file located in C:\\ProgramData using .NET BinaryFormatter without implementing input validation or deserialization safeguards. Because the file can be created or modified by a local user in default configurations, an attacker can supply a crafted serialized payload th
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:244aefe5ee375015533d68f7752ce661314b875c8e1444b86eec837050c75cb0
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Windows"],"product":"Avira Internet Security","vendor":"Gen Digital Inc.","versions":[{"lessThanOrEqual":"1.1.109.1990","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"1.1.114.3113","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["release-notes"],"url":"https://support.avira.com/hc/en-us/articles/360010656158-Current-Avira-versions"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/references/0
{"tags":["product"],"url":"https://www.avira.com/en/internet-security"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://www.gendigital.com/us/en/contact-us/security-advisories/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fb9415258c1b58380e60bea422a4b345f8ad278ed2553399d1ec4bdb635742d7 · sha256:76d862bb0f595023… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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