What’s Vulnerable › Vulnerabilities

CVE-2021-33577

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-18 · updated 2026-06-17

Description

An issue was discovered in Cleo LexiCom 5.5.0.0. The requirement for the sender of an AS2 message to identify themselves (via encryption and signing of the message) can be bypassed by changing the Content-Type of the message to text/plain.

Affected products

• Cleo Lexicom: 5.5.0.0

References

• https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0011.md
• https://www.cleo.com/cleo-lexicom
• https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0011.md
• https://www.cleo.com/cleo-lexicom

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