Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
3 results
Aug 5, 2026The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool (demo/LINUXTCP/port/porttcp.c).CVE-2026-71263 · Other software · cwalter-at · reported by 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2cCritical 9.1
The LINUXTCP port of FreeModbus contains an off-by-one bounds check in xMBPortTCPPool (demo/LINUXTCP/port/porttcp.c). The check uses a strict greater-than comparison instead of greater-than-or-equal against the 263-byte MB_TCP_BUF_SIZE limit.
- Product
- FreeModbus
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 14, 2025An issue was discovered in the demo/LINUXTCP implementation of cwalter-at freemodbus v.2018-09-12 allowing attackers to reach an infinite loop via a crafted lenCVE-2025-51986 · Other software · reported by MITREHigh 7.5
An issue was discovered in the demo/LINUXTCP implementation of cwalter-at freemodbus v.2018-09-12 allowing attackers to reach an infinite loop via a crafted length value for a packet.
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jul 8, 2024Buffer Overflow vulnerability in SILA Embedded Solutions GmbH freemodbus v.2018-09-12 allows a remtoe attacker to cause a denial of service via the LINUXTCP serCVE-2024-31504 · Other software · sila_embedded_solutions · reported by MITREHigh 7.5
Buffer Overflow vulnerability in SILA Embedded Solutions GmbH freemodbus v.2018-09-12 allows a remtoe attacker to cause a denial of service via the LINUXTCP server component.
- Product
- freemodbus
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgist.github.comgist.github.com
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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