Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2020-10543

CVE-2020-10543HIGH

n/a n/a — Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer …

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  L  H    8.2   .1133   95.9     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Mar 13  Reserved by mitre
  Jun 5   Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2020-10543. Received CVSS 8.2 and CPE data from NVD.

CWE-190, CWE-787 · CNA: mitre · CVSS v3.1 · 15 references · NVD status: Modified

Description

Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
March 13, 2020	Reserved	Reserved by mitre
June 5, 2020	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2020-10543. Received CVSS 8.2 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-190 · CWE-787

References (15)

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00044.html [Mailing List, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/Perl/perl5/blob/blead/pod/perl5303delta.pod [Third Party Advisory]
https://github.com/Perl/perl5/compare/v5.30.2...v5.30.3 [Third Party Advisory]
https://github.com/perl/perl5/commit/897d1f7fd515b828e4b198d8b8bef76c6faf03ed [Patch, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IN3TTBO5KSGWE5IRIKDJ5JSQRH7ANNXE/
https://security.gentoo.org/glsa/202006-03 [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20200611-0001/ [Third Party Advisory]
https://www.oracle.com//security-alerts/cpujul2021.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpuApr2021.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpuapr2022.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpujan2021.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpujan2022.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpuoct2020.html [Patch, Third Party Advisory]
https://www.oracle.com/security-alerts/cpuoct2021.html [Patch, Third Party Advisory]

Authoritative record: CVE-2020-10543 at cve.org

Weaknesses: CWE-190 · CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2020-10543 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.