Threats / SonicWall / CVE-2024-53704
CVE-2024-53704
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-08-04
SonicWall SonicOS vulnerability
SonicWall SonicOS contains an improper authentication vulnerability in the SSLVPN mechanism allowing remote attackers to bypass authentication without valid credentials.
Verdict
Today item, not a backlog item.
This authentication bypass in a widely-deployed VPN appliance enables unauthenticated remote access to protected networks. Active exploitation and ransomware deployment demonstrate immediate operational risk to organizations relying on SonicOS for perimeter security.
CISA KEV Yes · 2025-02-185Ransomware use Flagged5EPSS 0.95132 (verify live)6Exploit Weaponized · public PoC7CVSS 8.2 (CISA)4CISA SSVC Exploitation: active · Automatable: yes · Impact: partial4
01
Is it exploitable?
— the evidence, ranked above the scoreExploit available
Fully weaponized — public exploit code is cataloged for this vulnerability.We link the existence of the exploit; we do not host or redistribute payloads.
Reported exploitation
427 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-02-18), flagged for known ransomware use.
Probability (EPSS)
EPSS 0.95132 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H) · Affected: SonicWall, SonicOS. Confirm exact fixed builds in the vendor advisory.CVSS — CISA-assigned via the ADP container (CVE.org), version 3.1; the CNA left no metrics, so CISA's own score is used ahead of NVD.
Weakness (CWE)
Mapped to CWE-287 Improper Authentication — weakness family: Authentication.CWE — CNA-assigned (CVE.org); the weakness class drives how the flaw is exploited.
CISA SSVC (triage disposition)
Exploitation: active · Automatable: yes · Technical Impact: partialCISA's own stakeholder-specific triage inputs, published in the CVE record (CISA Coordinator role). NOTE: this is CISA's three decision points; the final Act/Attend/Track decision also requires a Mission & Well-being input not published here, so no overall decision is asserted.
Currency of the record
CISA added this to its KEV catalog 40 days after the CVE record was published.KEV lag = CISA-KEV dateAdded − CVE.org datePublished; a floor on how long the known-exploited flaw sat in the public record before the federal catalog listed it. Severity/weakness here is CNA- or CISA-assigned (current at disclosure), independent of NVD's analysis backlog.
Public exploit available
Public exploit tooling is catalogued for this CVE (a public proof-of-concept / detection template). Catalog entries: nuclei template. We link the catalog page(s) only — no payload or code is hosted or restated here.Link, never host — the catalog page is the source; basicsecurity.net does not redistribute payloads.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I identify the SSLVPN authentication weakness and craft requests that bypass credential validation.
Business
Attackers gain unauthorized remote access to the corporate network without valid user credentials.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I establish a foothold inside the network perimeter and move laterally to identify high-value systems.
Business
Internal systems become exposed to reconnaissance and compromise, expanding the attack surface beyond the VPN gateway.
3
Lateral reach — past segmentation narrative 3
Attacker
I deploy ransomware payloads across compromised systems to encrypt critical business data.
Business
Operations halt as ransomware encrypts files; the organization faces extortion demands and potential data theft.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05