CVE-2026-271712.9LowCWE-1284

CVE-2026-27171: zlib vulnerability

zlib

Fixed in 1.3.2 · Affected: zlib before 1.3.2 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.3%probability of exploitation in the next 30 days

15th percentile

050100

Higher than 15% of scored CVEs

2.9LowCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop that has no termination condition.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

zlib · zlibbefore 1.3.2

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Validation of Specified Quantity in Input · Input Validation and Logic
Vendor: zlib
Published: February 2026
Band: Unlikely (under 1%), February 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-27171 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.