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CVE-2026-48840

Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e148112a4db9debdbe020a25e23f44607e13d29f8d10007efc4d1a756444c5cf
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"Exim","repo":"https://code.exim/org/exim/exim","vendor":"Exim","versions":[{"lessThan":"4.99.4","status":"affected","version":"4.88","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-839","description":"CWE-839 Numeric Range Comparison Without Minimum Check","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/05/29/3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/adp/0/references/0
{"url":"https://exim.org/static/doc/security/EXIM-Security-2026-05-19.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/cna/references/0
{"url":"https://lists.debian.org/debian-lts-announce/2026/06/msg00004.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/adp/0/references/1
{"url":"https://www.openwall.com/lists/oss-security/2026/05/29/3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b773e0b498a746b417529c5f1b1f0389e9bc0657b89dc88204e431a50ea53bb · sha256:88fad4a56de58c2a… · /containers/cna/references/1

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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