Cyber Resilience

CVE-2026-8672

Avantra ≤ 25.3.0

Published
22 May 2026
Modified
23 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 5.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
EPSS Score 0.0010 1th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2026-8672 is a medium-severity Use of Default Password (CWE-1393) vulnerability in Avantra Avantra. Its CVSS base score is 5.1 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Default Accounts (T1078.001); ranked at the 1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to CM-6 (Configuration Settings) and IA-5 (Authenticator Management) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A07:2025 Authentication Failures

EU & UK References

Vulnerability Data

Use of default password vulnerability in syslink software AG Avantra on Linux, Windows allows Try Common or Default Usernames and Passwords. This issue affects Avantra: before 25.3.0.

CWE(s)
CWE-1393

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1078.001 Default Accounts Stealth
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
Why these techniques?

Default password weakness directly enables use of default accounts for initial access.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Likely ATT&CK TechniquesAI

Techniques this vulnerability likely enables, inferred from its description, weakness type, and attributed-actor tradecraft. Confidence is per-technique.

T1078 Valid Accounts Stealthconfidence: HIGH
Default password allows use of valid accounts for initial access.
attack.mitre.org →
T1110.004 Credential Stuffing Credential Accessconfidence: HIGH
Default credentials enable credential stuffing against the affected service.
attack.mitre.org →
inferred from description + CWE · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-14917Same product: Linux Linux Kernel
CVE-2026-35075Shared CWE-1393
CVE-2026-33784Shared CWE-1393
CVE-2025-22938Shared CWE-1393
CVE-2025-9589Shared CWE-1393
CVE-2025-2347Shared CWE-1393
CVE-2025-8077Shared CWE-1393
CVE-2026-5269Shared CWE-1393
CVE-2024-49559Shared CWE-1393
CVE-2023-26589Same product: Linux Linux Kernel

Affected Assets

avantra
avantra
≤ 25.3.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • IA-5 Authenticator Management
  • CM-6 Configuration Settings
  • AC-2 Account Management
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

IA-5 Authenticator Management good match
prevent

Directly requires changing or replacing default authenticators before use, eliminating the exact default-password weakness in Avantra.

CM-6 Configuration Settings good match
prevent

Enforces secure configuration settings that prohibit default passwords in installed software such as Avantra.

AC-2 Account Management partial match
prevent

Requires managed account provisioning that includes assignment of non-default credentials during initial setup.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.AA-01 full match
prevents

Credential management directly requires replacing default passwords with unique, strong credentials.

PR.PS-01 mostly match
prevents

Hardened configuration baselines explicitly prohibit default passwords, covering most of the weakness but not all identity-management aspects.

ID.RA-01 partial match
prevents

Vulnerability scanning will discover default-password instances, enabling remediation, yet does not itself prevent their initial use.

PR.AA-03 partial match
prevents

Authentication policies can enforce non-default passwords but do not address the full scope of credential lifecycle.

PR.AA-05 partial match
prevents

Authorization policies assume credentials already exist and are not default; least-privilege helps limit impact but does not prevent defaults.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.17 Authentication information mostly match
prevents

Mandates secure handling and change of authentication secrets, directly addressing default passwords.

A.8.9 Configuration management mostly match
prevents

Configuration management processes typically enforce changing defaults during hardening.

A.8.5 Secure authentication partial match
mitigates

Requires secure authentication mechanisms, which includes replacing or disabling default credentials.

A.8.18 Use of privileged utility programs none match
none

Utility programs often ship with defaults; control requires secure configuration before use.

A.8.2 Privileged access rights none match
none

Privileged accounts must not retain factory passwords, reducing risk of default-credential abuse.

References