CVE-2020-10188
No exploitation reported by the sources we read.
- Published2020-03-06
- WeaknessCWE-120
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
utility.c in telnetd in netkit telnet through 0.17 allows remote attackers to execute arbitrary code via short writes or urgent data, because of a buffer overflow involving the netclear and nextitem functions.
Timeline
dates in UTC- 2020-03-0615:15CVE publishedNVD
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-10188?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-10188?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 12.3 | = 12.3 | no fix published | NVD |
| 12.3 | = 12.3r12 | no fix published | NVD |
| 12.3 | = 12.3x48 | no fix published | NVD |
| 12.3 | = 12.3x50 | no fix published | NVD |
| 15.1 | = 15.1 | no fix published | NVD |
| 15.1 | = 15.1x49 | no fix published | NVD |
| 15.1 | = 15.1x49-d30 | no fix published | NVD |
| 15.1 | = 15.1x49-d60 | no fix published | NVD |
| 15.1 | = 15.1x49-d140 | no fix published | NVD |
| 15.1 | = 15.1x49-d150 | no fix published | NVD |
| 15.1 | = 15.1x49-d160 | no fix published | NVD |
| 16.1 | = 16.1 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.20 | ≤ 4.20.15 | no fix published | NVD |
| 4.21 | ≥ 4.21.0, ≤ 4.21.10m | no fix published | NVD |
| 4.22 | ≥ 4.22, ≤ 4.22.4m | no fix published | NVD |
| 4.23 | ≥ 4.23, ≤ 4.23.3m | no fix published | NVD |
| 4.24 | = 4.24.0f | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 30.x | = 30 | no fix published | NVD |
| 31.x | = 31 | no fix published | NVD |
| 32.x | = 32 | no fix published | NVD |
3 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
Advisories and patches
- github.comPatch
- www.oracle.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.19.8read 2026-10-23
- NVDCVSS 2.010read 2026-10-23
- NVDweakness (CWE)CWE-120read 2026-10-23
- FIRST EPSSEPSS score74.3 %read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2020-03-06
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2020-10188?
Is CVE-2020-10188 actively exploited?
What is the CVSS score for CVE-2020-10188?
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