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TI-2021-04857 Aliases CVE-2021-21812GHSA-pvj2-qmqv-76p3

Out-of-bounds write in AT&T

Priority LOW 34CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A stack-based buffer overflow vulnerability exists in the command-line-parsing HandleFileArg functionality of AT&T Labs’ Xmill 0.7. Within the function HandleFileArg the argument filepattern is under control of the user who passes it in from the command line. filepattern is passed directly to strcpy copying the path provided by the user into a static sized buffer without any length checks resulting in a stack-buffer overflow. An attacker can provide malicious input to trigger these vulnerabilities.

Why it matters now

EPSS 0.00333 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—AT&TAT&T Labs Xmill 0.7—No fix listedCNA
  • AT&T Vendor— Affected AT&T Labs Xmill 0.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:*0.7VulnerableAT&T
  • cpe:2.3:a:att:xmill:0.7:*:*:*:*:*:*:* Versions 0.7 Vulnerable ·AT&T

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21812
  2. 2026-10-03 Alias added: GHSA-pvj2-qmqv-76p3

References

Exploit 1

  • TI-2022-09848 A heap-based buffer overflow exists in XML Decompression DecodeTreeBlock in AT&T Labs… CVSS 3.1CRITICAL 9.8
  • TI-2021-04874 Heap-based buffer overflow in AT&T CVSS 3.1CRITICAL 9.8
  • TI-2021-04875 Heap-based buffer overflow in AT&T CVSS 3.1CRITICAL 9.8
  • TI-2021-04870 Heap-based buffer overflow in AT&T CVSS 3.1CRITICAL 9.8
  • TI-2021-04873 Buffer overflow in AT&T CVSS 3.1CRITICAL 9.8
  • TI-2021-04872 Buffer overflow in AT&T CVSS 3.1CRITICAL 9.8
See all 12 →

Sources

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