CVE-2017-15921

Exp

In Watchdog Anti-Malware 2.74.186.150 and Online Security Pro 2.74.186.150, the zam32.sys driver contains a NULL pointer dereference vulnerability that gets triggered when sending an operation to ioctl 0x80002010. This is due to the input buffer being NULL or the input buffer size being 0 as they are not validated.

Published: 2017-10-30 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-15921 is rated High Exploit Risk (75.7/100): CVSS High severity, with high exploitation likelihood (EPSS 9.66%, 92th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2017-15921

EDB-ID Source Kind Published Link
43058 exploit_db edb 2017-10-26 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-15921

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 2025-03-30 11.26% 9.66% -1.60%
2 2025-03-29 9.66% 11.26% +1.60%
3 2025-03-17 — 9.66% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-15921

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/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]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-15921

Affected software / configurations for CVE-2017-15921

Vendor Product Version Raw CPE
watchdogdevelopment anti-malware 2.74.186.150 cpe:2.3:a:watchdogdevelopment:anti-malware:2.74.186.150:*:*:*:*:*:*:*
watchdogdevelopment online_security_pro 2.74.186.150 cpe:2.3:a:watchdogdevelopment:online_security_pro:2.74.186.150:*:*:*:*:*:*:*

References for CVE-2017-15921

URL Tags
http://packetstormsecurity.com/files/144786/Watchdog-Development-Anti-Malware-Online-Security-Pro-NULL-Pointer-Dereference.html Exploit Issue Tracking Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/43058/ Exploit Issue Tracking Third Party Advisory VDB Entry
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