CVE-2020-2501: qnap systems inc. surveillance station Stack-based Buffer Overflow
Vulnerability summary
CVE-2020-2501 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in qnap systems inc. surveillance station. EPSS estimates a 2.94% chance of exploitation in the next 30 days, higher than 86.9% of scored vulnerabilities.
Timeline
- 17-02-2021PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
2.94%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.94% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Qnap1 product
- surveillance_station< 5.1.5.3.3 | ≥ 5.1.5.4.0, < 5.1.5.4.3
Qnap systems inc.1 product
- surveillance station≥ unspecified, < 5.1.5.4.3 | ≥ unspecified, < 5.1.5.3.3
2 vendors · 2 products