CVE-2022-31793

Name: CVE-2022-31793
Creator: NVD / NIST
Published: 2022-08-04T22:15:08.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 11.37%

Last modified Jun 17, 2026

CVE-2022-31793 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the filesystem. This occurs because the code skips over the first character when serving files. EPSS estimates a 11.37% chance of exploitation in the next 30 days.

Description

do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the filesystem. This occurs because the code skips over the first character when serving files. Arris NVG443, NVG599, NVG589, and NVG510 devices and Arris-derived BGW210 and BGW320 devices are affected.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

11.37%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Inglorion	Muhttpd	< 1.1.7
Arris	Nvg443 Firmware	All versions
Arris	Nvg599 Firmware	All versions
Arris	Nvg589 Firmware	All versions
Arris	Nvg510 Firmware	All versions
Arris	Bgw210 Firmware	All versions
Arris	Bgw320 Firmware	All versions

References

http://inglorion.net/software/muhttpd/Third Party Advisory
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2022/08/millions-of-arris-routers-are-vulnerable-to-path-traversal-attacks/Third Party Advisory
https://derekabdine.com/blog/2022-arris-advisoryExploit, Third Party Advisory
https://kb.cert.org/vuls/id/495801Third Party Advisory, US Government Resource
http://inglorion.net/software/muhttpd/Third Party Advisory
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2022/08/millions-of-arris-routers-are-vulnerable-to-path-traversal-attacks/Third Party Advisory
https://derekabdine.com/blog/2022-arris-advisoryExploit, Third Party Advisory
https://kb.cert.org/vuls/id/495801Third Party Advisory, US Government Resource
https://www.kb.cert.org/vuls/id/495801

Timeline

Published: Aug 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-31793?

How severe is CVE-2022-31793?

CVE-2022-31793 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 11.37% probability of exploitation in the next 30 days.

How do I fix CVE-2022-31793?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-31793?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST