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CVE-2021-34345

Stack Based Overflow Vulnerability in NVR Storage Expansion

CRITICAL
9.8
CVSS Score
Published: September 10, 2021 at 04:00 AM UTC
Updated: June 17, 2026 at 03:55 AM UTC
29 products affected across 1 vendorTl R1200C Rp FirmwareTl R1200S Rp FirmwareTl R1620SDC Firmware

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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%

Description

A stack buffer overflow vulnerability has been reported to affect QNAP device running NVR Storage Expansion. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of NVR Storage Expansion: NVR Storage Expansion 1.0.6 ( 2021/08/03 ) and later

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

EJ1600 Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-ej1600 (same device)
Tl D1600S Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-d1600s (same device)
Tl D400S Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-d400s (same device)
Tl D800C Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-d800c (same device)
Tl D800S Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-d800s (same device)
Tl R1200C Rp Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-r1200c-rp (same device)
Tl R1200S Rp Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-r1200s-rp (same device)
Tl R1220SEP Rp Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-r1220sep-rp (same device)
Tl R1620SDC Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-r1620sdc (same device)
Tl R1620SEP Rp Firmware· Qnap
95%
v < 1.0.6
Affected range stops below 1.0.6, so it looks safe — our inference, not a vendor statement
qnap-tl-r1620sep-rp (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.qnap.com/en/security-advisory/qsa-21-36

CVSS

9.8CRITICALqnap
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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