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PatchSiren cyber security CVE debrief

CVE-2021-20028 SonicWall CVE debrief

CVE-2021-20028 is a SQL injection vulnerability in SonicWall Secure Remote Access (SRA). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-28, and the KEV record marks it as associated with known ransomware campaign use. CISA also notes the impacted product is end-of-life and should be disconnected if still in use. Because the product is legacy and the vulnerability is known to be exploited, this should be treated as an urgent legacy-asset risk rather than a routine patch item.

Vendor
SonicWall
Product
Secure Remote Access (SRA)
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-28
Original CVE updated
2022-03-28
Advisory published
2022-03-28
Advisory updated
2022-03-28

Who should care

Security and IT teams that still operate or inherit SonicWall Secure Remote Access (SRA), especially owners of internet-facing remote access infrastructure, vulnerability management teams, and incident responders supporting legacy appliances.

Technical summary

The supplied records identify CVE-2021-20028 as a SQL injection vulnerability affecting SonicWall Secure Remote Access (SRA). The most actionable details in the corpus come from CISA’s KEV entry: the vulnerability is known to be exploited, the product is end-of-life, and CISA’s required action is to disconnect it if it is still in use. The corpus does not provide a CVSS score.

Defensive priority

Critical

Recommended defensive actions

  • Inventory all SonicWall Secure Remote Access (SRA) instances and confirm whether any remain in production or exposed to the internet.
  • If SRA is still in use, follow CISA’s guidance and disconnect or retire the end-of-life product as soon as possible.
  • Prioritize immediate containment and incident response review for any exposed or previously exposed SRA deployments because the vulnerability is listed as known exploited.
  • Replace the legacy remote access solution with a supported platform and confirm migration paths for all users and integrations.
  • Use the official CVE, NVD, and CISA KEV references to validate ownership, exposure, and remediation status.

Evidence notes

The title and description identify a SQL injection vulnerability in SonicWall Secure Remote Access (SRA). CISA’s KEV metadata for this CVE lists vendorProject SonicWall, product Secure Remote Access (SRA), dateAdded 2022-03-28, dueDate 2022-04-18, knownRansomwareCampaignUse as Known, and requiredAction stating the impacted product is end-of-life and should be disconnected if still in use. The supplied corpus does not include a CVSS score.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-20028 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-20028

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2021-20028 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-20028

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.