CVE-2022-31793

Exp

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.

Published: 2022-08-04 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-31793 is rated High Exploit Risk (80.4/100): CVSS High severity, with high exploitation likelihood (EPSS 93.82%, 100th percentile). 1 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-2022-31793

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

Exploit prediction scoring system (EPSS) score for CVE-2022-31793

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 2026-02-14 93.35% 93.82% +0.47%
2 2026-02-03 93.82% 93.35% -0.47%
3 2025-11-21 — 93.82% —

Full EPSS history (30 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-31793

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N 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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2022-31793

Affected software / configurations for CVE-2022-31793

Vendor Product Version Raw CPE
inglorion muhttpd < 1.1.7 cpe:2.3:a:inglorion:muhttpd:*:*:*:*:*:*:*:*
arris nvg443_firmware — cpe:2.3:o:arris:nvg443_firmware:-:*:*:*:*:*:*:*
arris nvg599_firmware — cpe:2.3:o:arris:nvg599_firmware:-:*:*:*:*:*:*:*
arris nvg589_firmware — cpe:2.3:o:arris:nvg589_firmware:-:*:*:*:*:*:*:*
arris nvg510_firmware — cpe:2.3:o:arris:nvg510_firmware:-:*:*:*:*:*:*:*
arris bgw210_firmware — cpe:2.3:o:arris:bgw210_firmware:-:*:*:*:*:*:*:*
arris bgw320_firmware — cpe:2.3:o:arris:bgw320_firmware:-:*:*:*:*:*:*:*

References for CVE-2022-31793

cvelogic Threat Intelligence