CVE-2026-40210: medium-severity vulnerability in PowerDNS DNSdist
Out-of-bounds read in SetMacAddrAction
Published
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.8epss 0.7%
exploitation probability
0.7%top 47% of all CVEs
observed exploitation
nono source reports it
An out-of-bounds read might happen when SetMacAddrAction is used, potentially resulting in uninitialized memory being sent over the network or a crash.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L
Affected products
PowerDNS · DNSdistRelated CVEs — PowerDNS DNSdist
In the same product, most dangerous first.
CVE-2026-33598MEDIUMOut-of-bounds read in cache inspection via LuaEPSS 2.8%CVE-2025-30194HIGHDenial of service via crafted DoH exchangeEPSS 2.3%CVE-2026-27853MEDIUMOut-of-bounds write when rewriting large DNS packetsEPSS 1.5%CVE-2026-27854MEDIUMUse after free when parsing EDNS options in LuaEPSS 1.3%CVE-2026-33602MEDIUMOff-by-one access when processing crafted UDP responsesEPSS 1.2%CVE-2024-25581HIGHTransfer requests received over DoH can lead to a denial of service in DNSdistEPSS 1.1%