cyberscoop.com August 20, 2025 - A Russian state-sponsored group known as Static Tundra has persistently exploited the Cisco CVE-2018-0171 vulnerability to compromise network devices worldwide, targeting key industries and evading detection for years, according to new findings by Cisco Talos.
The group, designated “Static Tundra” by Cisco Talos, is linked to the Russian Federal Security Service’s Center 16 unit and operates as a likely sub-cluster of the broader “Energetic Bear” threat group. The operation represents one of the most persistent network device compromise campaigns documented to date, with the group maintaining undetected access to victim systems for multiple years.

According to the researchers, the group has been leveraging CVE-2018-0171, a vulnerability in Cisco IOS software’s Smart Install feature that was patched when initially disclosed in 2018. Despite the availability of patches, the group continues to find success targeting organizations that have left devices unpatched or are running end-of-life equipment that cannot be updated.

The vulnerability allows attackers to execute arbitrary code on affected devices or trigger denial-of-service conditions.

Researchers believe the group has developed automated tooling to exploit the vulnerability at scale, likely identifying targets through publicly available network scanning data from services such as Shodan or Censys.

Once initial access is gained, the group employs sophisticated techniques to extract device configuration data, which often contains credentials and network information valuable for further compromise. The attackers use a combination of Trivial File Transfer Protocol (TFTP) servers and Simple Network Management Protocol (SNMP) tools to maintain access and collect intelligence.

The espionage campaign has affected organizations in telecommunications, higher education, and manufacturing sectors across North America, Asia, Africa, and Europe. Victim selection appears to align with Russia’s strategic interests, with researchers noting a significant escalation in operations against Ukrainian entities following the onset of the Russia-Ukraine conflict.

“One of the clearer targeting shifts we observed was that Static Tundra’s operations against entities in Ukraine escalated at the start of the Russia-Ukraine war, and have remained high since then,” the Cisco Talos report states. The group expanded its targeting within Ukraine from selective, limited compromises to operations across multiple industry verticals.