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CVE-2009-3279

16
FAUCET Score

CVE-2009-3279 describes a vulnerability in QNAP TS-239 Pro and TS-639 Pro NAS devices running specific firmware versions, where the LUKS partition uses AES-256 in plain CBC mode. This misconfiguration allows local attackers to extract sensitive information through a watermark attack. The vulnerability has a CVSS score of 4.9, indicating a medium severity with local access and low attack complexity, leading to a complete compromise of confidentiality. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.7_0613CPE matchmatch criteria
cpe:2.3:h:qnap:ts-239_pro_turbo_nas:2.1.7_0613:*:*:*:*:*:*:*
3.1.0_0627CPE matchmatch criteria
cpe:2.3:h:qnap:ts-239_pro_turbo_nas:3.1.0_0627:*:*:*:*:*:*:*
3.1.1_0815CPE matchmatch criteria
cpe:2.3:h:qnap:ts-239_pro_turbo_nas:3.1.1_0815:*:*:*:*:*:*:*
2.1.7_0613CPE matchmatch criteria
cpe:2.3:h:qnap:ts-639_pro_turbo_nas:2.1.7_0613:*:*:*:*:*:*:*
3.1.0_0627CPE matchmatch criteria
cpe:2.3:h:qnap:ts-639_pro_turbo_nas:3.1.0_0627:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

AV:L/AC:L/Au:N/C:C/I:N/A:N

Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 52nd percentile among its peer group of 3,050 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/36793
baseline-security.de / downloads/BSC-Qnap_Crypto_Backdoor-CVE-2009-3200.txt
Exploit
securityfocus.com / archive/1/506607/100/0/threaded