CVE-2001-0554: Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute ar…
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 38.7%
EPSS score, percentile 98.6 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- Not scored
The CVE record carries no CVSS score.
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of options including AYT (Are You There), which is not properly handled by the telrcv function.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
- CLA-2001:413
- MDKSA-2001:068
- SSRT0745U
- MSS-OAR-E01-2001:298
- RHSA-2001:100
- SuSE-SA:2001:029
- RHSA-2001:099
- 20020129 Cisco CatOS Telnet Buffer Vulnerability
- HPSBUX0110-172
- DSA-075
- CSSA-2001-030.0
- DSA-070
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.
Source: CVE List, as of . About the data.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |