CVE-2024-39815 | Vonets WiFi Bridges Improper Check or Handling of Exceptional Conditions

Improper check or handling of exceptional conditions vulnerability affecting Vonets industrial wifi bridge relays and wifi bridge repeaters, software versions 3.3.23.6.9 and prior, enable an unauthenticated remote attacker to cause a denial of service. A specially-crafted HTTP request to pre-authentication resources can crash the service.

Published: 2024-08-12 Last update: 2024-08-20 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-39815 is rated Moderate Risk (63.4/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.78%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-39815

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.56% 0.78% +0.22%
2 2025-11-18 0.76% 0.56% -0.19%
3 2025-09-28 — 0.76% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-39815

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.4 4.0 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:H)
High privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:H)
High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:H)
High integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:H)
High confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:H)
High integrity impact on subsequent systems.
Subsequent system availability impact (SA:H)
High availability impact on subsequent systems.
Exploit maturity (threat) (E:X)
Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X)
Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X)
Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X)
Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X)
Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X)
Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X)
Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X)
Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X)
Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X)
Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X)
Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X)
Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X)
Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X)
Not evaluated.
Automatable (supplemental) (AU:X)
Not evaluated.
Recovery (supplemental) (R:X)
Not evaluated.
Value density (supplemental) (V:X)
Not evaluated.
Vulnerability response effort (supplemental) (RE:X)
Not evaluated.
Provider urgency (supplemental) (U:X)
Not evaluated.
 — — [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.3 6.0 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2024-39815

Affected software / configurations for CVE-2024-39815

Vendor Product Version Raw CPE
vonets var1200-h_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:var1200-h_firmware:*:*:*:*:*:*:*:*
vonets var1200-l_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:var1200-l_firmware:*:*:*:*:*:*:*:*
vonets var600-h_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:var600-h_firmware:*:*:*:*:*:*:*:*
vonets vap11ac_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11ac_firmware:*:*:*:*:*:*:*:*
vonets vap11g-500s_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11g-500s_firmware:*:*:*:*:*:*:*:*
vonets vbg1200_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vbg1200_firmware:*:*:*:*:*:*:*:*
vonets vap11s-5g_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11s-5g_firmware:*:*:*:*:*:*:*:*
vonets vap11s_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11s_firmware:*:*:*:*:*:*:*:*
vonets var11n-300_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:var11n-300_firmware:*:*:*:*:*:*:*:*
vonets vap11g-300_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11g-300_firmware:*:*:*:*:*:*:*:*
vonets vap11n-300_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11n-300_firmware:*:*:*:*:*:*:*:*
vonets vap11g_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11g_firmware:*:*:*:*:*:*:*:*
vonets vap11g-500_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vap11g-500_firmware:*:*:*:*:*:*:*:*
vonets vga-1000_firmware <= 3.3.23.6.9 cpe:2.3:o:vonets:vga-1000_firmware:*:*:*:*:*:*:*:*

References for CVE-2024-39815

URL Tags
https://www.cisa.gov/news-events/ics-advisories/icsa-24-214-08 Third Party Advisory US Government Resource
cvelogic Threat Intelligence