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CVE-2019-16278

99
FAUCET Score

CVE-2019-16278 is a critical directory traversal vulnerability in nostromo nhttpd through version 1.9.6, specifically within the http_verify function. This flaw allows unauthenticated attackers to achieve remote code execution through a specially crafted HTTP request. With a CVSS score of 9.8 (Critical) and an EPSS score indicating high exploitability, this vulnerability poses a severe risk. It is actively exploited in the wild, with public exploit code available in Metasploit and Nuclei templates, and has garnered significant community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.9.7CPE matchmatch criteria
cpe:2.3:a:nazgul:nostromo_nhttpd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
99.06%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Nov 7, 2024
Metasploit: Nostromo Directory Traversal Remote Command Execution · Oct 20, 2019
Nuclei: CVE-2019-16278 · Sep 1, 2020
ExploitDB: EDB-47837 · Jan 1, 2020
This CVE's current EPSS score of 0.9906 is in the 100th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
packetstormsecurity.com / files/155045/Nostromo-1.9.6-Directory-Traversal-Remote-Command-Execution.html
ExploitThird Party AdvisoryVDB Entry
packetstormsecurity.com / files/155802/nostromo-1.9.6-Remote-Code-Execution.html
ExploitThird Party AdvisoryVDB Entry
git.sp0re.sh / sp0re/Nhttpd-exploits
Broken LinkExploitThird Party Advisory
sp0re.sh
Broken LinkNot Applicable
nazgul.ch / dev/nostromo_cl.txt
Release Notes