CVE-2021-28801— Out-of-Bounds Read Vulnerability in QSS
Quick assessment
Affected
QNAP Systems Inc. QSS
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.
QNAP Systems QSS是中国威联通（QNAP Systems）公司的一款非网管型交换机。 QNAP Switch System (QSS)存在安全漏洞，该漏洞源于越界读取。攻击者可利用该漏洞读取系统上的敏感信息。以下产品和版本受到影响：QNAP Systems Inc. QSS versions prior to 1.0.2 build 20210122 on QSW-M2108-2C; versions prior to 1.0.2 build 20210122 on QSW-M2108-2S
Possible ATT&CK Techniques 1 AI
T1213 · Data from Information Repositories
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2021-28801
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Out-of-Bounds Read Vulnerability in QSS
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds read vulnerability has been reported to affect certain QNAP switches running QSS. If exploited, this vulnerability allows attackers to read sensitive information on the system. This issue affects: QNAP Systems Inc. QSS versions prior to 1.0.2 build 20210122 on QSW-M2108-2C; versions prior to 1.0.2 build 20210122 on QSW-M2108-2S; versions prior to 1.0.2 build 20210122 on QSW-M2108R-2C.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
QNAP Switch System 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
QNAP Systems QSS是中国威联通（QNAP Systems）公司的一款非网管型交换机。 QNAP Switch System (QSS)存在安全漏洞，该漏洞源于越界读取。攻击者可利用该漏洞读取系统上的敏感信息。以下产品和版本受到影响：QNAP Systems Inc. QSS versions prior to 1.0.2 build 20210122 on QSW-M2108-2C; versions prior to 1.0.2 build 20210122 on QSW-M2108-2S
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| QNAP Systems Inc. | QSS | unspecified ~ 1.0.2 build 20210122 | - |
|
| QNAP Systems Inc. | QSS | unspecified ~ 1.0.2 build 20210122 | - |
|
| QNAP Systems Inc. | QSS | unspecified ~ 1.0.2 build 20210122 | - |
|
II. Public POCs for CVE-2021-28801
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-28801
请登录查看更多情报信息。
Other References for CVE-2021-28801 (1)
-
https://www.qnap.com/zh-tw/security-advisory/qsa-21-23 x_refsource_MISC
Same Patch Batch · QNAP Systems Inc. · 2021-06-11 · 3 CVEs total
| CVE-2021-28814 | 8.8 HIGH | Improper Access Control Vulnerability in Helpdesk |
| CVE-2021-28805 | 7.8 HIGH | Inclusion of Sensitive Information in QSS |
IV. Related Vulnerabilities
Same product: QSS
Same weakness: CWE-125
-
CVE-2026-16782
SVG File Parsing Out-of-Bounds Read Vulnerability in Autodes -
CVE-2026-78475
Gimp: unbounded stack vla and 21-byte stack over-read in pix -
CVE-2026-78157
Open5GS Rx AA-Request pcrf-rx-path.c pcrf_rx_aar_cb out-of-b -
CVE-2026-78049
Systerel S2OPC AddNodes Service sopc_node_mgt_helper_interna -
CVE-2026-54789
mod_auth_openidc has out-of-bounds read and write in state c
V. Comments for CVE-2021-28801
No comments yet