CVE-2022-31793
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 17.7%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 17.75% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-22
- Affected
- inglorion/muhttpd · arris/nvg443 firmware · arris/nvg599 firmware · arris/nvg589 firmware · arris/nvg510 firmware · arris/bgw210 firmware · arris/bgw320 firmware
- Source
- cve@mitre.org
EPSS moved from 16.9% on 28 September 2026 to 17.7% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.