# CVE-2026-126993: SiteServer SSCMS captcha inadequate encryption

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- SiteServer / SSCMS: 7.2.0 (affected); 7.2.1 (affected); 7.2.2 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 5.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 4.3 (medium); AV:N/AC:M/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-326, CWE-310

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/436288 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/436288/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-126993 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1040543 (CNA: VulDB; third-party-advisory)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-126993; retrieved 2026-11-12; source updated 2026-11-12

Revision: a957a5d112d855593f50eab8c76910de6337eb52a30ade3a69dd679f0551ce6a

Canonical: https://y2.dev/cve/CVE-2026-126993

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.