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TI-2026-74379 Aliases CVE-2026-79957

IDOR in ServiceNext SerTec exposes all user profiles and passwords

Priority HIGH 70CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

ServiceNext SerTec from version 1.00 contains an insecure direct object reference in the /api/Usuario/GetUsuarios endpoint (CWE-639). The endpoint accepts a user-controlled numeric ID without checking that the authenticated token belongs to the requested account. Any authenticated user can retrieve the full profile of other users, including passwords stored in cleartext, which enables account takeover.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

ServiceNext contains an insecure direct object reference (IDOR) in the /api/Usuario/GetUsuarios endpoint, which accepts a user-controlled numeric ID in the request body without verifying that the authenticated token belongs to the requested account (CWE-639). Any authenticated user can iterate the ID parameter to retrieve the full profile record of every other user, including passwords stored in cleartext (CWE-256), enabling account takeover and credential-stuffing attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00308 23rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ServiceNextSerTec1.00—No fix listedCNA
  • SerTec VendorServiceNext Affected 1.00 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for SerTec.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-15 Threatist record created from CVE-2026-79957
  2. 2026-10-16 Priority changed: MEDIUM → LOW
  3. 2026-10-18 CISA SSVC decision points changed
  4. 2026-10-18 Priority changed: LOW → HIGH

References

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences