SonicWall SSL-VPN flaw CVE-2026-19868 can bypass SAML MFA
SonicWall calls exploitation only potential; Gen7 through 7.3.3-7015 and Gen8 through 8.2.2-8015 need firmware, with no workaround.
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Vulnerability1 · 1 read
CVE-2026-82308
Heap buffer overflow in SonicOS SSL-VPN allowing remote DoS
- CVSS 3.1
- 7.5 high
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
A heap-based buffer overflow in the SonicOS SSL-VPN service allows remote unauthenticated attackers to trigger application-level denial of service over the network. No authentication or user interaction is needed. SonicOS SSL-VPN users are affected.
What to do: Apply SonicWall's update for CVE-2026-82308.
| Product | Affected |
|---|---|
| SonicWall SonicOS | — |
Estimated exposure
No basis for an estimate.
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
A pre-authentication heap-based buffer overflow vulnerability has been identified in the SonicOS SSL-VPN service, which could potentially enable a remote unauthenticated attacker to cause an application level denial of service.
- Weakness
- CWE-122
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
In the news
2 storiesCISA adds SonicWall SonicOS MFA bypass to KEV catalog
CISA urges FCEB agencies to patch by November 20, 2026; possible exploitation reported
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