CVE-2023-5959

Auth Bypass in Byzoro Smart S85F Firmware v31r02b10-01

Public PoCAuth Bypass

Published

11 November 2023

Modified

21 November 2024

CVSS Score v3.1 4.3

Click a component to see what it means

Raw vector

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

EPSS Score 0.0088 58th percentile

Risk Priority 39 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-5959 is a medium-severity Weak Password Recovery Mechanism for Forgotten Password (CWE-640) vulnerability in Byzoro Smart S85F Firmware. Its CVSS base score is 4.3 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Junk Data (T1001.001); ranked in the top 42% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2023-58230

Vulnerability Data

A vulnerability, which was classified as problematic, was found in Byzoro Smart S85F Management Platform V31R02B10-01. Affected is an unknown function of the file /login.php. The manipulation of the argument txt_newpwd leads to weak password recovery. The exploit has been…

disclosed to the public and may be used. The identifier of this vulnerability is VDB-244992. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

CWE(s): CWE-640

Related Threats

MITRE ATT&CK Enterprise Techniques

T1001.001 Junk Data Command And Control

Adversaries may add junk data to protocols used for command and control to make detection more difficult.

attack.mitre.org →

T1003.003 NTDS Credential Access

Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.

attack.mitre.org →

T1003.006 DCSync Credential Access

Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…

attack.mitre.org →

T1003.007 Proc Filesystem Credential Access

Adversaries may gather credentials from the proc filesystem or `/proc`.

attack.mitre.org →

T1010 Application Window Discovery Discovery

Adversaries may attempt to get a listing of open application windows.

attack.mitre.org →

T1016 System Network Configuration Discovery Discovery

Adversaries may look for details about the network configuration and settings, such as IP and/or MAC addresses, of systems they access or through information discovery of remote systems.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-5684Same product: Byzoro Smart S85F

CVE-2023-5683Same product: Byzoro Smart S85F

CVE-2023-4739Same product: Byzoro Smart S85F

CVE-2023-4121Same product: Byzoro Smart S85F

CVE-2023-4414Same product: Byzoro Smart S85F

CVE-2023-4120Same product: Byzoro Smart S85F

CVE-2025-7948Shared CWE-640

CVE-2024-6125Shared CWE-640

CVE-2023-53958Shared CWE-640

CVE-2020-37172Shared CWE-640

Affected Assets

byzoro

smart s85f firmware

v31r02b10-01

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

IA-5 Authenticator Management

addresses: CWE-640

Establishing procedures for lost or compromised authenticators addresses weak password recovery mechanisms.

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 partial match

blocks

Credential lifecycle management directly includes password reset/recovery flows.

PR.AA-02 partial match

blocks

Identity proofing is the core control that prevents weak or bypassed recovery mechanisms.

PR.AA-03 partial match

blocks

Authentication policy covers strength/MFA but does not address recovery path weaknesses.

PR.PS-06 partial match

blocks

Secure SDLC reduces implementation flaws but is not specific to password-recovery design.

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.5.14 Information transfer partial match

removes

A.5.15 Access control partial match

removes

A.5.16 Identity management partial match

removes

A.5.17 Authentication information partial match

degrades

Strong authentication-information lifecycle rules directly address weak password-recovery flows.

A.5.18 Access rights partial match

removes

A.8.10 Information deletion partial match