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CVE-2026-55012

Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:814f60767ff146e5bb008bfdbf86d32a371e72cafeaf6c6ecdfe29c23b24cd5b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en-US","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/problemTypes/0/descriptions/1

{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en-US","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"Microsoft Malware Protection Engine","vendor":"Microsoft","versions":[{"lessThan":"1.1.26060.3008","status":"affected","version":"1.1.0.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-190","description":"CWE-190: Integer Overflow or Wraparound","lang":"en-US","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"Microsoft Defender Remote Code Execution Vulnerability","tags":["vendor-advisory","patch"],"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55012"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ade6b73e2e76a9105a8d411d5416ee66f1beaceada8935b3a4c30534e407211c · sha256:dadea7808e86d221… · /containers/cna/references/0

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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