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CVE-2025-20352 is a stack-based buffer overflow in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software. The flaw can be triggered by sending a crafted SNMP packet to an affected device over IPv4 or IPv6. The vulnerability affects SNMP functionality across versions. On affected Cisco IOS and Cisco IOS XE devices, an authenticated remote attacker with low privileges can trigger a device reload and denial of service. On affected Cisco IOS XE devices, an authenticated remote attacker with higher privileges can leverage the same flaw to execute arbitrary code as the root user. Exploitation requires SNMP access using an SNMPv1 or SNMPv2c read-only community string or valid SNMPv3 credentials, with the code-execution path additionally requiring administrative or privilege 15 access on the device. Successful exploitation can result in service interruption or full system compromise.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
210 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco IOS/IOS XE SNMP flaw that can enable remote code execution or denial of service and is reported as exploited in the wild.
A stack-based buffer overflow vulnerability in Cisco IOS/IOS XE SNMP functionality, confirmed to be actively exploited.
Remote code execution zero-day in Cisco IOS/IOS-XE described as exploited (per threat intelligence reporting).
A stack-based buffer overflow in Cisco IOS and IOS XE SNMP subsystem allowing DoS or remote code execution, actively exploited in the wild and affecting millions of devices, including industrial switches.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.