CVE-2025-2764: autokit Signature Bypass (CVSS 8)

Description

CarlinKit CPC200-CCPA update.cgi Improper Verification of Cryptographic Signature Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of CarlinKit CPC200-CCPA devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of update packages provided to update.cgi. The issue results from the lack of proper verification of a cryptographic signature. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24355.

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CVSS v3.1 Score

8.0

HIGH

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-347 CWE-347

Affected Products

Vendor	Product	Versions
carlinkit	autokit	All
carlinkit	cpc200-ccpa	All

References

Other References

https://www.zerodayinitiative.com/advisories/ZDI-25-178/

Frequently Asked Questions

What is CVE-2025-2764? +

CarlinKit CPC200-CCPA update.cgi Improper Verification of Cryptographic Signature Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of CarlinKit CPC200-CCPA devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of update packages provided to update.cgi. The issue results from the lack of proper verification of a cryptographic signature. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24355. It has a CVSS v3.1 base score of 8.0 (HIGH).

How severe is CVE-2025-2764? +

CVE-2025-2764 has a CVSS v3.1 score of 8.0 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-2764? +

CVE-2025-2764 affects products from carlinkit, specifically: autokit, cpc200-ccpa. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-2764? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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