CVE-2021-20193

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.09% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 65.3% of scored records. A rank, not a probability.

NVD base score

3.3 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-03-26 16:41Z5 YR AGO

Last updated

2026-10-14 10:04Z15 DAYS AGO

Reserved

2020-12-17

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant
• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

ddf56d131d02a07fa8cb82671f36b669b4104926061cce74db4ead985390a5dc

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1917565x_refsource_MISC
• savannah.gnu.orghttps://savannah.gnu.org/bugs/?59897x_refsource_MISC
• git.savannah.gnu.orghttps://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777x_refsource_MISC
• security.gentoo.orgGLSA-202105-29https://security.gentoo.org/glsa/202105-29vendor-advisoryx_refsource_GENTOO
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html