CVE-2026-57432: Perl versions through 5.43.10 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack

highCVSS 7.5CVE-2026-57432

CSIRTS triage

vendor: Perl product: PerlOtheraffected: through 5.43.10

What: Integer overflow leads to an out-of-bounds heap read in pack and unpack.
Who is affected: Deployments using Perl versions through 5.43.10.
Urgency: Remediation is important due to the potential for memory corruption issues.
Action: Update Perl to a version later than 5.43.10.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 7.5
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57432

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-574320.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57432	coverage & exploitation status	NVD · CVE.org

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