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TI-2021-16799 Aliases CVE-2021-39534GHSA-4wgj-77qr-7qgf

An issue was discovered in libslax through v0.22.1.

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
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

An issue was discovered in libslax through v0.22.1. slaxIsCommentStart() in slaxlexer.c has a heap-based buffer overflow.

Why it matters now

EPSS 0.01271 69th 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:juniper:libslax:*:*:*:*:*:*:*:*up to 0.22.1VulnerableJuniper
  • cpe:2.3:a:juniper:libslax:*:*:*:*:*:*:*:* Versions up to 0.22.1 Vulnerable ·Juniper

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39534
  2. 2026-10-03 Alias added: GHSA-4wgj-77qr-7qgf

References

Exploit 1

  • TI-2021-16798 An issue was discovered in libslax through v0.22.1. CVSS 3.1HIGH 8.8
  • TI-2021-16796 An issue was discovered in libslax through v0.22.1. CVSS 3.1HIGH 8.8
  • TI-2019-16029 Out-of-bounds write in juniper/libslax CVSS 3.0MEDIUM 6.5
  • TI-2021-16797 An issue was discovered in libslax through v0.22.1. CVSS 3.1MEDIUM 6.5

Sources

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