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CVE-2026-78319— TOCTOU Vulnerability in file exchange

Quick assessment

Affected
Sauter modu680-AS
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.

受影响的软件产品中运行的某个服务存在一个潜在的“检查时与使用时”（Time-of-Check/Time-of-Use, TOCTOU）竞态条件。 未经身份验证的远程攻击者可利用此竞态条件来绕过既定的安全控制措施。 这可能导致未授权的代码执行。

CVSS 9.3 · Critical EPSS 0.40% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
Sauter ecos504 1.0.0< 7.0.0 affected
Sauter ecos505 1.0.0< 7.0.0 affected
Sauter modu612-LC 1.0.0< 4.0.0 affected
Sauter modu660-AS 1.0.0< 4.0.0 affected
Sauter modu680-AS 1.0.0< 4.0.0 affected
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I. Basic Information for CVE-2026-78319

Vulnerability Information
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Vulnerability Title
TOCTOU Vulnerability in file exchange
Source: CVE Program / CVE List V5
Vulnerability Description
A service running on the affected products contains a potential Time-of-Check Time-of-Use (TOCTOU) race condition. An unauthenticated remote attacker could exploit this race condition to bypass intended security controls. This may result in the execution of unauthorized code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Sauter modu680-AS 1.0.0 ~ 4.0.0 -
Sauter modu660-AS 1.0.0 ~ 4.0.0 -
Sauter modu612-LC 1.0.0 ~ 4.0.0 -
Sauter ecos504 1.0.0 ~ 7.0.0 -
Sauter ecos505 1.0.0 ~ 7.0.0 -

II. Public POCs for CVE-2026-78319

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-78319

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Vendor Advisories for CVE-2026-78319 (2)

IV. Related Vulnerabilities

Same vendor: Sauter
Same weakness: CWE-367

V. Comments for CVE-2026-78319

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