CVE-2023-34971

HIGH
MEDIUM Priority: 0.01 BB Relevance: 63/100
Published: 2023-08-24 Modified: 2026-11-10 First seen: 2026-11-10 Status: active

Attack Surface

Adjacent Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Adjacent
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

An inadequate encryption strength vulnerability has been reported to affect QNAP operating systems. If exploited, the vulnerability possibly allows local network clients to decrypt the data using brute force attacks via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 5.0.1.2425 build 20230609 and later QTS 5.1.0.2444 build 20230629 and later QTS 4.5.4.2467 build 20230718 and later QuTS hero h5.1.0.2424 build 20230609 and later QuTS hero h4.5.4.2476 build 20230728 and later

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
qnap qts 4.5.4 – 4.5.4.2467
qnap quts_hero h4.5.4 – h4.5.4.2476

References & Advisories (1)

Bug Bounty Relevance

63 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.10%
Raw Score 0.001030
Percentile 1.0%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00103
2026-11-13
0.00103
2026-11-12
0.00103
2026-11-10
0.00103
2026-11-09
0.00103

Intelligence Sources

nvd ref →