Is CVE-2021-22925 in the CISA KEV catalog?

No. CVE-2021-22925 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-22925?

CVE-2021-22925 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-22925?

CVE-2021-22925 has an EPSS score of 4.93% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-22925?

Upgrade curl on ubuntu 14.04 to 7.35.0-1ubuntu2.20+esm14 or later. Fixes are available for 6 affected products.

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 Exposure CWE-908

How to fix

Remediation Available

curlUbuntu

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

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+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

libcurl3-nssUbuntu

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

libcurl4Ubuntu

Fixed in:7.58.0-2ubuntu3.14USN-5021-1

Fixed in:7.68.0-1ubuntu2.6USN-5021-1

UniversalForwarderWindows application

Affected:8.2.0 8.2.12Fixed in:8.2.12Splunk, Inc.

Affected:9.0.0 9.0.6Fixed in:9.0.6Splunk, Inc.

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

Patch4

Third-Party Advisory8

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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.