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Exploited. On CISA's list since 2021-11-03.
CVE-2020-5735 · Amcrest Cameras and Network Video Recorder (NVR) · Published 2020-04-08
8.8 out of 10
CVSS rates it high.
36%
Estimated chance of exploitation in the next 30 days, higher than 98% of all scored flaws (EPSS, 2026-10-29).
Yes
CISA has seen it exploited in real attacks. For US government agencies the fix is deadline passed 1641 days ago (2022-05-03).
Apply updates per vendor instructions.
Amcrest cameras and NVR contain a stack-based buffer overflow vulnerability through port 37777 that allows an unauthenticated, remote attacker to crash the device and possibly execute code.
Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777. An authenticated remote attacker can abuse this issue to crash the device and possibly execute arbitrary code.
From the NVD.
Explore this week’s weaknesses and all learning topics
Understand the kind of weakness behind this flaw. These resources teach the weakness, rather than reproduce this specific CVE. Follow the vendor's advice above to fix the affected product.
A write runs past a buffer on the stack and can overwrite nearby program state.
CWE-121 · CISA KEV; NVD record: vulnreport@tenable.com
Video course · Free course. C programming and memory concepts are useful; covers several weakness types.
A program writes outside the memory region it is allowed to use.
CWE-787 · NVD record: nvd@nist.gov
Video course · Free course. C programming and memory concepts are useful; covers several weakness types.
CWE is a catalogue of weakness types. Labels come from the sources shown and can differ or change. Resource matches reviewed 16 October 2026.
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Exploited flaws from CISA's KEV catalogue. Chance of exploitation from EPSS by FIRST. Descriptions and scores from the NVD. This product uses the NVD API but is not endorsed or certified by the NVD.