CVE-2026-126993— SiteServer SSCMS captcha inadequate encryption

Quick assessment

Affected

SiteServer SSCMS

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 SiteServer SSCMS 7.2.2 及以下版本中发现了一个安全漏洞。受影响的是文件中的某个未知功能。通过篡改参数，可导致加密强度不足。该攻击可远程实施。相关利用代码已向公众发布，可能被用于实际攻击。厂商虽在披露初期被通知，但至今未作任何回应。

CVSS 5.3 · Medium Updated Nov 12, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

SiteServer SSCMS captcha inadequate encryption

Source: CVE Program / CVE List V5

Vulnerability Description

A security flaw has been discovered in SiteServer SSCMS up to 7.2.2. Impacted is an unknown function of the file /api/v1/captcha. Performing a manipulation of the argument Value results in inadequate encryption strength. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

不充分的加密强度

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
SiteServer	SSCMS	7.2.0	`cpe:2.3:a:sscms:sscms::::::::`

II. Public POCs for CVE-2026-126993

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-126993

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Vendor Advisories for CVE-2026-126993 (1)

CVE-2026-126993 | SiteServer SSCMS up to 7.2.2 /api/v1/captcha value inadequate encryption vdb-entry technical-description

Other References for CVE-2026-126993 (3)

https://vuldb.com/cve/CVE-2026-126993 third-party-advisory
https://vuldb.com/vuln/436288/cti signature permissions-required
https://vuldb.com/submit/1040543 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-126993

IV. Related Vulnerabilities

Same product: SSCMS

Same vendor: SiteServer

Same weakness: CWE-326