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CVE-2026-5450

Calling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9225c1cc09f58cfcaa4251aa9d58cfa0956acd5c42c93abbe631d9a4e75c4aae
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 6 assertions

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/2

{"defaultStatus":"unaffected","product":"glibc","vendor":"The GNU C Library","versions":[{"lessThan":"*","status":"affected","version":"2.7","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/cna/affected/0

{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/4

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/0

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/1

{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/3

Affected products and versions

6 source assertions
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/2
{"defaultStatus":"unaffected","product":"glibc","vendor":"The GNU C Library","versions":[{"lessThan":"*","status":"affected","version":"2.7","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/cna/affected/0
{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/4
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/0
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/1
{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"V3.1.6","status":"affected","version":"V3.1.5","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/affected/3

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/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:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-122","description":"CWE-122 Heap-based buffer overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/1/references/0
{"tags":["mailing-list"],"url":"https://inbox.sourceware.org/libc-announce/b11f0003-6ec1-4bd6-b9de-9e38a4efeca3@redhat.com/T/#u"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /containers/adp/0/references/0
{"tags":["issue-tracking"],"url":"https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2026-5450"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d5dda81f0c7d259bd154f849a835709d8b33c2495908d32cb9116428295bc990 · sha256:52b77a071bcc3a66… · /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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