No exploitation reportedFix available

CVE-2021-39293

Q: Is CVE-2021-39293 actively exploited?

Active exploitation of CVE-2021-39293 has not been confirmed. Its EPSS score was 6.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-39293?

CVE-2021-39293 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-01-24
Fixed in1.17.1 · 1.16.8
WeaknessCWE-770

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In archive/zip in Go before 1.16.8 and 1.17.x before 1.17.1, a crafted archive header (falsely designating that many files are present) can cause a NewReader or OpenReader panic. NOTE: this issue exists because of an incomplete fix for CVE-2021-33196.

Timeline

dates in UTC

2022-01-2401:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-39293?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-39293?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Branch	Affected	Fixed in	Source
1.17	≥ 1.17.0, < 1.17.1	1.17.1	NVD
1.16	< 1.16.8	1.16.8	NVD

Netapp cloud insights telegraf

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Go to 1.17.1 · 1.16.8

Advisories and patches

groups.google.comRelease Notes

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-770read 2026-10-23
FIRST EPSSEPSS score6.9 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-01-24
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-39293?

Is CVE-2021-39293 actively exploited?

Active exploitation of CVE-2021-39293 has not been confirmed. Its EPSS score was 6.9% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-39293?

CVE-2021-39293 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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