CVE-2021-3326

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

3.82% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 90.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-01-27 00:00Z5 YR AGO

Last updated

2026-10-14 09:49Z15 DAYS AGO

Reserved

2021-01-27

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-617Reachable AssertionBase

Data version

5.2

Document digest

bc4496b82d051ecf8b4f1662596731639a3845968b91c0f3f5e24507c041b9f8

• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=27256
• sourceware.orghttps://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=7d88c6142c6efc160c0ee5e4f85cde382c072888
• www.openwall.com[oss-security] 20210128 Re: glibc iconv crash with ISO-2022-JP-3http://www.openwall.com/lists/oss-security/2021/01/28/2mailing-list
• security.gentoo.orgGLSA-202107-07https://security.gentoo.org/glsa/202107-07vendor-advisory
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.html
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210304-0007/
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• lists.debian.org[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security updatehttps://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlmailing-list
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-831302.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html