CVE & CISA-KEV Catalog

CVE-2021-22925

MEDIUMEPSS 91th pctl
5.3
CVSS v3
NVD

Description

curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.

CWE-200Information ExposureCWE-908

How to fix

Remediation Available
curlUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm14USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm7USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm3USN-5021-2
Fixed in:7.58.0-2ubuntu3.14USN-5021-1
Fixed in:7.68.0-1ubuntu2.6USN-5021-1
libcurl3Ubuntu
Fixed in:7.35.0-1ubuntu2.20+esm14USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm7USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm3USN-5021-2
libcurl3-gnutlsUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm14USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm7USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm3USN-5021-2
Fixed in:7.58.0-2ubuntu3.14USN-5021-1
Fixed in:7.68.0-1ubuntu2.6USN-5021-1
libcurl3-nssUbuntu
Fixed in:7.35.0-1ubuntu2.20+esm14USN-5894-1
Fixed in:7.47.0-1ubuntu2.19+esm3USN-5021-2
Fixed in:7.47.0-1ubuntu2.19+esm7USN-5894-1
Fixed in:7.58.0-2ubuntu3.14USN-5021-1
Fixed in:7.68.0-1ubuntu2.6USN-5021-1
libcurl4Ubuntu
Fixed in:7.58.0-2ubuntu3.14USN-5021-1
Fixed in:7.68.0-1ubuntu2.6USN-5021-1
UniversalForwarderWindows application
Affected:9.0.0 9.0.6Fixed in:9.0.6Splunk, Inc.
Affected:8.2.0 8.2.12Fixed in:8.2.12Splunk, Inc.

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

4.93%probability of exploitation in 30 days
91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2024-24919High8.6100%KEV + Ransom-
CVE-2020-14181Medium5.3100%-Fix
CVE-2021-34429Medium5.399%-Fix
CVE-2018-11409Medium5.398%--
CVE-2021-41277Critical10.097%KEV-
CVE-2016-2183High7.596%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.