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CVE-2026-2967

A security vulnerability has been detected in Cesanta Mongoose up to 7.20. This affects the function getpeer of the file /src/net_builtin.c of the component TCP Sequence Number Handler. The manipulation leads to improper verification of source of a communication channel. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitability is reported as difficult. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disc
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e0206b783311e86a465d6064174a886fea448b5fdb2e1fcfd6f8342911ca7279
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/3/cvssV2_0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*"],"modules":["TCP Sequence Number Handler"],"product":"Mongoose","vendor":"Cesanta","versions":[{"status":"affected","version":"7.0"},{"status":"affected","version":"7.1"},{"status":"affected","version":"7.2"},{"status":"affected","version":"7.3"},{"status":"affected","version":"7.4"},{"status":"affected","version":"7.5"},{"status":"affected","version":"7.6"},{"status":"affected","version":"7.7"},{"status":"affected","version":"7.8"},{"status":"affected","version":"7.9"},{"status":"affected","version":"7.10"},{"status":"affected","version":"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/metrics/3/cvssV2_0

CWE assertions

1 source assertion
{"cweId":"CWE-940","description":"Improper Verification of Source of a Communication Channel","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/dwBruijn/CVEs/blob/main/Mongoose/tcp_rst.md#poc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/references/4
{"name":"VDB-347334 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.347334"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/references/1
{"name":"VDB-347334 | Cesanta Mongoose TCP Sequence Number net_builtin.c getpeer verification of source","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.347334"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /containers/cna/references/0
{"name":"Submit #755450 | Cesanta Mongoose Embedded Web Server 7.20 Improper Validation of Specified Index, Position, or Offset in I","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.755450"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:89679d9008d0f2c20c116ef9264e90a316c80de35e6d197a00e1de4c64d08110 · sha256:02e3f20268aead55… · /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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