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CVE-2026-9397

A weakness has been identified in Besen BS20 EV Charging Station up to 20260426. Affected by this issue is some unknown functionality of the component OTA Update Installation Handler. This manipulation causes improper authorization. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitation is known to be difficult. The original disclosure mentions, that "[t]hese vulnerabilities have been reported to Besen and we have received their
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ae9c8a4934c489698eb5abcc4eff9e7eec6f5456f19b1d6f5948c3b6a7732e14
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":7.6,"vectorString":"AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/2/cvssV3_0
cwe · 2 assertions

{"cweId":"CWE-285","description":"Improper Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-266","description":"Incorrect Privilege Assignment","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:besen:bs20_ev_charging_station:*:*:*:*:*:*:*:*"],"modules":["OTA Update Installation Handler"],"product":"BS20 EV Charging Station","vendor":"Besen","versions":[{"status":"affected","version":"20260426"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":7.6,"vectorString":"AV:N/AC:H/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":8.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/metrics/2/cvssV3_0

CWE assertions

2 source assertions
{"cweId":"CWE-285","description":"Improper Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-266","description":"Incorrect Privilege Assignment","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"tags":["patch"],"url":"https://github.com/carfeii/besen#finding-4-unauthorized-firmware-installation-via-spoofed-ota-updates"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/references/3
{"name":"Submit #813576 | Besen EV Charging Station BS20 EV Charger Embedded Malicious Code","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/813576"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/references/2
{"name":"VDB-365378 | Besen BS20 EV Charging Station OTA Update Installation improper authorization","tags":["vdb-entry"],"url":"https://vuldb.com/vuln/365378"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /containers/cna/references/0
{"name":"VDB-365378 | CTI Indicators (IOB, IOC, TTP)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/365378/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f6ed187382a5caa8f3daea1a3ea8b42da7eb320d9f4b0ca33269d7168b5453b2 · sha256:a964265c49da1273… · /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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