CVE-2021-34812

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-18 · updated 2026-06-17
Weakness: CWE-798

Description

Use of hard-coded credentials vulnerability in php component in Synology Calendar before 2.4.0-0761 allows remote attackers to obtain sensitive information via unspecified vectors.

Affected products

Synology Calendar: before 2.4.0-0761 — fixed in 2.4.0-0761

How to fix

Upgrade to a fixed version: Synology Calendar 2.4.0-0761. Check the vendor advisory for mitigations.

References

https://www.synology.com/security/advisory/Synology_SA_21_12
https://www.synology.com/security/advisory/Synology_SA_21_12

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