What’s Vulnerable › Vulnerabilities

CVE-2021-20653

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-17 · updated 2026-06-17
• Weakness: CWE-276

Description

Calsos CSDJ (CSDJ-B 01.08.00 and earlier, CSDJ-H 01.08.00 and earlier, CSDJ-D 01.08.00 and earlier, and CSDJ-A 03.08.00 and earlier) allows remote attackers to bypass access restriction and to obtain unauthorized historical data without access privileges via unspecified vectors.

Affected products

• NEC Csdj-A Firmware: through 03.08.00
• NEC Csdj-B Firmware: through 01.08.00
• NEC Csdj-D Firmware: through 01.08.00
• NEC Csdj-H Firmware: through 01.08.00

References

• https://jpn.nec.com/security-info/secinfo/nv21-006.html
• https://jvn.jp/en/jp/JVN87164507/index.html
• https://jpn.nec.com/security-info/secinfo/nv21-006.html
• https://jvn.jp/en/jp/JVN87164507/index.html

Get alerted when CVE-2021-20653 or the next vulnerability affects your stack