The Patching Friars' AlmanacA calendar of CVE saints

April 21

BRIDGE:BREAKHoly card for bridge-break, generated with AI (Claude, Anthropic) for the Lunario dei Frati Patchatori.CC BY-NC-SA 4.0 BRIDGE:BREAK PONS FRACTUS
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Saint BRIDGE:BREAK, Who Broke the Serial Bridge

Patron of serial-to-Ethernet converters, PLCs that still speak RS-232, and little boxes forgotten at the back of the cabinet.

Life

On 21 April 2026 Forescout Vedere Labs published BRIDGE:BREAK, a study of the converters that connect legacy serial equipment, such as PLCs and protective relays, to IP networks. In devices from Lantronix and silex technology they found 22 new vulnerabilities, some able to take over the device remotely. In the lab the researchers made a thermometer swing between -40 and +40 degrees: a bridge that, once broken, falsifies whatever crosses from one bank to the other.

Prayer

O Saint BRIDGE:BREAK, who watches over the bridges between the old world and the new, let no one cross them without leave, and keep them far from the internet. Amen.

How to celebrate

Celebrated by updating converter firmware, changing factory credentials and segmenting the industrial network.

Old bridge, new toll.

Technical record

Disclosed on
April 21 2026
CVE
CVE-2026-32955CVE-2026-32956CVE-2026-32957CVE-2026-32958CVE-2026-32959CVE-2026-32960CVE-2026-32961CVE-2026-32962CVE-2026-32963CVE-2026-32964CVE-2026-32965CVE-2015-5621CVE-2024-24487CVE-2025-67039CVE-2025-67041CVE-2025-70082CVE-2025-67034CVE-2025-67038CVE-2025-67036CVE-2025-67035CVE-2025-67037
CVSS
9.8Actively exploited (CISA KEV)
Product
silex technology, Inc. · SD-330AC

SD-330AC and AMC Manager provided by silex technology, Inc. contain a stack-based buffer overflow vulnerability in processing the redirect URLs. Arbitrary code may be executed on the device.

Sources: forescout.com · forescout.com

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