CVE-2018-15173

Exp

Nmap through 7.70, when the -sV option is used, allows remote attackers to cause a denial of service (stack consumption and application crash) via a crafted TCP-based service.

Published: 2018-08-08 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-15173 is rated High Exploit Risk (81.2/100): CVSS High severity, with high exploitation likelihood (EPSS 6.08%, 92th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.87% over the last day, indicating growing attacker interest. 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-2018-15173

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-15173

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 2026-06-15 2.21% 6.08% +3.87%
2 2026-06-06 2.05% 2.21% +0.16%
3 2026-05-07 — 2.05% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-15173

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-2018-15173

OS Trackers for CVE-2018-15173

vendor priority summary link
alpine high CVE-2018-15173: 1 source package rows (nmap); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2018-15173
debian unimportant CVE-2018-15173 unimportant priority: Debian including 1 source packages (nmap), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2018-15173
redhat low — https://access.redhat.com/security/cve/CVE-2018-15173
suse medium CVE-2018-15173 severity moderate: SUSE including 28 source package names (ncat-7.70-3.5.1, ncat-7.70-lp150.2.9.1, …), 54 product×package rows across 32 product lines (SUSE Linux Enterprise High Performance Computing 12 SP5, SUSE Linux Enterprise Module for Basesystem 15, … (32 product lines)): Fixed 53, Known Not Affected 1. https://www.suse.com/security/cve/CVE-2018-15173/
ubuntu low CVE-2018-15173 low priority: Ubuntu including 1 source packages (nmap), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, ignored 3, needs-triage 2, needed 1, released 1. https://ubuntu.com/security/CVE-2018-15173

Affected software / configurations for CVE-2018-15173

Vendor Product Version Raw CPE
nmap nmap <= 7.70 cpe:2.3:a:nmap:nmap:*:*:*:*:*:*:*:*

References for CVE-2018-15173

cvelogic Threat Intelligence