CVE-2023-41101

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2023-11-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in the captive portal in OpenNDS before version 10.1.3. get_query in http_microhttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions 10.x and later. Attackers may exploit the issue to crash OpenNDS (Denial-of-Service condition) or to inject and execute arbitrary bytecode (Remote Code Execution). Affected OpenNDS before version 10.1.3 fixed in OpenWrt master and OpenWrt 23.05 on 23. November by updating OpenNDS to version 10.2.0.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation2% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

November 17, 2023

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated Aug 10, 2026
Patch available. Sources: github_commit, github_release.
generic
https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006-v4/#sthash.2vJg3d85.rwx82g1C.dpbs
github_commit

commit 88c98c910acc (openwrt/routing)

Fix landed in openwrt/routing commit 88c98c910acc — awaiting tagged release

https://github.com/openwrt/routing/commit/88c98c910acccab694b3afb6d36d70ca429118a6
github_release Patch Available

OpenNDS v10.1.3 release

Patch available: openNDS/openNDS v10.1.3

https://github.com/openNDS/openNDS/releases/tag/v10.1.3
github_commit Patch Available

commit c294cf30e0a2 (openNDS/openNDS)

Patch available: openNDS/openNDS v10.1.3 (contains commit c294cf30e0a2)

https://github.com/openNDS/openNDS/commit/c294cf30e0a2512062c66e6becb674557b4aed8d

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
opennds10.2.0+dfsg-1, 10.3.0+dfsg-0.1, 10.3.1+dfsg-1, 9.10.0-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
opennds—10.2.0+dfsg-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
opennds—10.2.0+dfsg-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 134 total refreshes for this CVE.

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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2023-41101?
CVE-2023-41101 is a critical vulnerability published on November 17, 2023. An issue was discovered in the captive portal in OpenNDS before version 10.1.3. getquery in httpmicrohttpd.c does not validate the length of the query string of GET requests. This leads to a stack-based buffer overflow in versions 9.x and earlier, and to a heap-based buffer overflow in versions…
When was CVE-2023-41101 disclosed?
CVE-2023-41101 was first published in the National Vulnerability Database on November 17, 2023, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-41101 actively exploited?
CVE-2023-41101 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 22.3% of all scored CVEs.
What is the CVSS score of CVE-2023-41101?
CVE-2023-41101 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-41101?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-41101, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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