SARA / Free Tools / CVE / CVE-2020-5135

CVE-2020-5135 — SonicWall SonicOS Buffer Overflow Vulnerability

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4

CVSS
EPSS
24.99% (top 3.90%)
CWE
CWE-120
Published
2020-10-12T10:40:28.000Z
Last modified
2025-10-21T23:35:35.728Z
CVSS vector
CISA KEV — Actively Exploited
Added to KEV
2022-03-15
BOD 22-01 due
2022-04-05
Ransomware use
Unknown

01What is this vulnerability?

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v and Gen 7 version 7.0.0.0.

02Affected products

VendorProductVersions
SonicWallSonicOSSonicOS 6.5.4.7-79n and earlier, SonicOS 6.5.1.11-4n and earlier, SonicOS 6.0.5.3-93o and earlier, SonicOSv 6.5.4.4-44v-21-794 and earlier, SonicOS 7.0.0.0-1

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-03-15. Ransomware use: Unknown.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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