What’s Vulnerable › Vulnerabilities

CVE-2021-46521

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-27 · updated 2026-06-17
• Weakness: CWE-120

Description

Cesanta MJS v2.20.0 was discovered to contain a global buffer overflow via c_vsnprintf at mjs/src/common/str_util.c.

Affected products

• Cesanta mJS: 2.20.0

References

• https://github.com/cesanta/mjs/issues/190
• https://github.com/cesanta/mjs/issues/190

Get alerted when CVE-2021-46521 or the next vulnerability affects your stack