---
title: "Security digests, May 2026"
url: https://erroneo.us/security/archive/2026-05/
description: "Every daily security digest from May 2026: 5 editorial briefs, 21 known exploited (CISA KEV) additions and 203 critical advisories, day by day, with links…"
type: security-archive-month
section: "Security Digest"
date_modified: 2026-05-29
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digests, May 2026

- [May 29, 2026](https://erroneo.us/security/2026-05-29/index.md): 1 known exploited (CISA KEV) addition and 16 critical advisories
- [May 28, 2026](https://erroneo.us/security/2026-05-28/index.md): 1 editorial brief and 5 critical advisories
- [May 27, 2026](https://erroneo.us/security/2026-05-27/index.md): 3 known exploited (CISA KEV) additions and 5 critical advisories
- [May 26, 2026](https://erroneo.us/security/2026-05-26/index.md): 1 known exploited (CISA KEV) addition and 7 critical advisories
- [May 22, 2026](https://erroneo.us/security/2026-05-22/index.md): 1 known exploited (CISA KEV) addition and 3 critical advisories
- [May 21, 2026](https://erroneo.us/security/2026-05-21/index.md): 1 editorial brief, 2 known exploited (CISA KEV) additions and 7 critical advisories
- [May 20, 2026](https://erroneo.us/security/2026-05-20/index.md): 7 known exploited (CISA KEV) additions and 2 critical advisories
- [May 19, 2026](https://erroneo.us/security/2026-05-19/index.md): 16 critical advisories
- [May 18, 2026](https://erroneo.us/security/2026-05-18/index.md): 7 critical advisories
- [May 15, 2026](https://erroneo.us/security/2026-05-15/index.md): 1 known exploited (CISA KEV) addition
- [May 14, 2026](https://erroneo.us/security/2026-05-14/index.md): 1 known exploited (CISA KEV) addition and 18 critical advisories
- [May 13, 2026](https://erroneo.us/security/2026-05-13/index.md): 4 critical advisories
- [May 12, 2026](https://erroneo.us/security/2026-05-12/index.md): 19 critical advisories
- [May 11, 2026](https://erroneo.us/security/2026-05-11/index.md): 1 editorial brief and 9 critical advisories
- [May 8, 2026](https://erroneo.us/security/2026-05-08/index.md): 1 known exploited (CISA KEV) addition and 18 critical advisories
- [May 7, 2026](https://erroneo.us/security/2026-05-07/index.md): 1 known exploited (CISA KEV) addition and 9 critical advisories
- [May 6, 2026](https://erroneo.us/security/2026-05-06/index.md): 1 known exploited (CISA KEV) addition and 24 critical advisories
- [May 5, 2026](https://erroneo.us/security/2026-05-05/index.md): 17 critical advisories
- [May 4, 2026](https://erroneo.us/security/2026-05-04/index.md): 15 critical advisories
- [May 3, 2026](https://erroneo.us/security/2026-05-03/index.md): 1 editorial brief
- [May 2, 2026](https://erroneo.us/security/2026-05-02/index.md): 1 editorial brief
- [May 1, 2026](https://erroneo.us/security/2026-05-01/index.md): 1 known exploited (CISA KEV) addition and 2 critical advisories

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Source page: https://erroneo.us/security/archive/2026-05/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt