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TI-2021-22429 Aliases CVE-2021-47813GHSA-533p-5pv2-f9qj

Backup Key Recovery 2.2.7 - Denial of Service (PoC)

Priority HIGH 69CWE-120Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

Backup Key Recovery 2.2.7 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the registration code input field. Attackers can paste a large buffer of 256 repeated characters into the registration key field to trigger application instability and potential crash.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.004 34th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NsasoftBackup Key Recovery2.2.7.0—No fix listedCNA
  • Backup Key Recovery VendorNsasoft Affected 2.2.7.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47813
  2. 2026-10-03 Alias added: GHSA-533p-5pv2-f9qj

References

Exploit 1

Other 1

  • TI-2020-19254 Nsauditor 3.2.1.0 - Buffer Overflow (SEH+ASLR bypass (3 bytes overwrite)) CVSS 4.0HIGH 8.4
  • TI-2019-15783 NetShareWatcher 1.5.8.0 SEH Buffer Overflow CVSS 4.0HIGH 8.6
  • TI-2019-15390 SpotAuditor 5.3.2 - 'Base64' Local Buffer Overflow (SEH) CVSS 4.0HIGH 8.4
  • TI-2018-15438 Nsauditor 3.0.28.0 Local SEH Buffer Overflow CVSS 4.0HIGH 8.6
  • TI-2021-22509 Nsauditor 3.2.2.0 - 'Event Description' Denial of Service CVSS 4.0MEDIUM 6.7
  • TI-2021-22431 Nsauditor 3.2.3 - Denial of Service (PoC) CVSS 4.0MEDIUM 6.7
See all 50 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences