A vulnerability was found in ACME Ultra Mini HTTPd 1.21. It has been classified as problematic. This affects an unknown part of the component HTTP GET Request Handler. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-249819.
CVE-2024-0263
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.4%, top 30% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 65(Attend)EG Risk 65/100SSVC: Attend
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 computedSeverity75% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS
- 69.6%
- KEV
- Not listed
Published
January 7, 2024
Last Modified
June 17, 2026
References (10)
- cna@vuldbhttps://0day.today/exploit/description/39212
- cna@vuldbhttps://packetstormsecurity.com/files/176333/Ultra-Mini-HTTPd-1.21-Denial-Of-Service.html
- cna@vuldbhttps://vuldb.com/?ctiid.249819
- cna@vuldbhttps://vuldb.com/?id.249819
- cna@vuldbhttps://www.youtube.com/watch?v=HWOGeg3e5As
- af854a3a-2127-422b-91ae-364da2661108https://0day.today/exploit/description/39212
- af854a3a-2127-422b-91ae-364da2661108https://packetstormsecurity.com/files/176333/Ultra-Mini-HTTPd-1.21-Denial-Of-Service.html
- af854a3a-2127-422b-91ae-364da2661108https://vuldb.com/?ctiid.249819
- af854a3a-2127-422b-91ae-364da2661108https://vuldb.com/?id.249819
- af854a3a-2127-422b-91ae-364da2661108https://www.youtube.com/watch?v=HWOGeg3e5As
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 14× 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.
- 2026-07-23 14:16 UTCEPSS rescore
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- 2026-06-24 06:37 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
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- 2026-05-24 11:00 UTCGHSA enrichment
Related CVEs(same CWE)
Same CWE
10 shownCWE-404
- CVE-2018-8639NVD 7.8EG 9.0 KEVEPSS 97%HIGH
- CVE-2018-8611NVD 7.8EG 9.0 KEVEPSS 90%HIGH
- CVE-2018-8453NVD 7.8EG 9.0 KEVEPSS 99%HIGH
- CVE-2018-8406NVD 7.8EG 9.0 KEVHIGH
- CVE-2018-8405NVD 7.8EG 9.0 KEVHIGH
- CVE-2018-8120NVD 7.0EG 9.0 KEVEPSS 99%HIGH
- CVE-2017-6627NVD 7.5EG 9.0 KEVEPSS 93%HIGH
- CVE-2018-8450EG 8.8EPSS 97%HIGH
- CVE-2019-1708EG 8.6HIGH
- CVE-2019-1706EG 8.6HIGH
Frequently asked(5)
What is CVE-2024-0263?
When was CVE-2024-0263 disclosed?
Is CVE-2024-0263 actively exploited?
What is the CVSS score of CVE-2024-0263?
How do I remediate CVE-2024-0263?
Dependency Blast Radius
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