CVE-2013-6277Public exploitNetwork attack vector

RSA private-key disclosure via embedded credentials

Published Feb 13, 2020 · Updated Aug 6, 2024

Hard-coded credentials in QNAP VioCard 300 firmware builds RS_B3722 and RS_B4631 allow remote attackers to read RSA private keys. The firmware image stores reusable private-key material as fixed data instead of protecting a device-specific secret. No authentication or user interaction is required, and the published impact is limited to disclosure; the keys' operational role is undisclosed.

CVSS severity7.5
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in QNAP VioCard 300 firmware builds RS_B3722 and RS_B4631 allow remote attackers to read RSA private keys. The firmware image stores reusable private-key material as fixed data instead of protecting a device-specific secret. No authentication or user interaction is required, and the published impact is limited to disclosure; the keys' operational role is undisclosed.

The record

CVE
CVE-2013-6277
Published
Feb 13, 2020
Updated
Aug 6, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, T1552.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1552.004Unsecured Credentials Private Keys

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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