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TI-2026-86084 Aliases CVE-2026-77709GHSA-chg8-5pc7-9qfp

Heap-based buffer overflow in SonicOS TACACS+ client allows DoS

Priority LOW 24CWE-122Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
—
Impact type
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Confidentiality · integrity · availability
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Fix status
No fix listed

No CVSS vector from any source. Fix status from CNA.

Summary

SonicWall SonicOS versions 7.3.3-7015 and older versions and 8.2.2-8015 and older versions are affected by a pre-authentication heap-based buffer overflow in the TACACS+ authentication client. Under specific conditions, a remote unauthenticated attacker can exploit the flaw to cause an application-level denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

A pre-authentication heap-based buffer overflow vulnerability has been identified in the SonicOS TACACS+ authentication client, which in specific conditions could potentially enable a remote unauthenticated attacker to cause an application level denial of service.

Why it matters now

EPSS 0.00659 51st percentileScored 2026-11-07
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
SonicWallSonicOS7.3.3-7015 and older versions; 8.2.2-8015 and older versions—No fix listedCNA
  • SonicOS VendorSonicWall Affected 7.3.3-7015 and older versions; 8.2.2-8015 and older versions Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*——SonicWall
  • cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* Versions — — ·SonicWall

Remediation

The sources list no fixed version for SonicWall SonicOS.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    SonicWall SonicOS — psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0014

    7 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-86082 SAML authentication bypass in SonicWall SonicOS SSLVPN servicePriority CRITICAL 90
    • TI-2026-86074 Permissive cross-domain policy in SonicWall SonicOS managementPriority MEDIUM 41
    • TI-2026-86073 Session validation flaw in SonicWall SonicOS management interfacePriority MEDIUM 41
    Show all 7 records → Advisory →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-77709
  2. 2026-11-06 Alias added: GHSA-chg8-5pc7-9qfp

References

Advisory 1

  • TI-2026-57684 Server-side request forgery in SonicWall SMA1000 KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-12965 Server-side request forgery in SonicWall SMA1000 KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-16819 Deserialization of untrusted data in SonicWall SMA1000 KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-03356 Stack-based buffer overflow in SonicWall SMA100 KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-03349 SQL injection in SonicWall SRA/SMA100 KEVCVSS 3.1CRITICAL 9.8
See all 283 →

Sources

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