CVE-2021-42237 on CISA KEV

Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.

01What CISA says about this vulnerability

Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• sitecore.com — http://sitecore.com
• support.sitecore.com — https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776
• blog.assetnote.io — https://blog.assetnote.io/2021/11/02/sitecore-rce/
• packetstormsecurity.com — http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remo…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

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