Vulnerability · Published Jun 14, 2021 · Assigned by sonicwall

CVE-2021-20027

High 7.5

In plain English

A high-severity buffer overflow in SonicOS from SonicWall. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.3%top 29.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A buffer overflow vulnerability in SonicOS allows a remote attacker to cause a Denial of Service (DoS) by sending a specially crafted request. This vulnerability affects SonicOS Gen5, Gen6, Gen7 platforms, and SonicOSv virtual firewalls.

Affected products (as reported)

Vendor	Product	Versions
SonicWall	SonicOS	SonicOS 5.9.1.13 and earlierSonicOSv 6.5.4.4 and earlierSonicOS 6.0.5.3 and earlierSonicOS 6.5.1.12 and earlierSonicOS 6.5.4.7 and earlierSonicOS 7.0.1-R1219 and earlierSonicOS 7.0.1-R514 and earlierSonicOS 7.0.1-R1262 and earlier

Weakness: CWE-120

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0016 x_refsource_CONFIRM