NATO on Monday issued a forceful condemnation of what it described as Russia's "persistent malicious cyber activities," warning that Moscow's cyber operations against Allied governments and critical infrastructure remain a significant threat to the security of the alliance.
In a statement released by the North Atlantic Council, NATO's principal political decision-making body, the alliance accused Russia of leveraging its extensive cyber ecosystem to target both NATO members and partner nations.
"We strongly condemn Russia's persistent malicious cyber activities, leveraging its cyber ecosystem to target Allies and NATO partners," the statement said. "These activities constitute a threat to Allied security."
The declaration comes as Western governments have increasingly characterized cyberattacks as a central element of Russia's broader "hybrid warfare" strategy, a campaign that combines cyber intrusions, espionage, disinformation, sabotage, economic coercion and political influence operations below the threshold of conventional military conflict.
NATO expressed solidarity with Allies affected by the attacks and noted parallel statements issued Monday by the United Kingdom and the European Union condemning Russia's activities.
Both London and Brussels announced coordinated sanctions targeting Russian intelligence officers, hackers and organizations accused of conducting cyber operations against Europe over many years.
According to European officials, the sanctions target individuals and entities allegedly linked to Russia's Federal Security Service (FSB), military intelligence service (GRU), and companies that provided support for cyber operations.
Authorities said Russian-backed campaigns have targeted governments, defense industries, diplomatic institutions, research organizations and energy infrastructure across Europe for years.
Among the incidents highlighted by European officials was an attempted cyberattack against Poland's energy infrastructure that authorities said could have disrupted heating services for large numbers of residents during the winter.
Officials have also linked Russian actors to cyber operations targeting railway systems, government agencies and critical infrastructure in several NATO countries.
Russia has repeatedly denied conducting state-sponsored cyberattacks against Western nations.
Monday's NATO statement called on Moscow to cease what it described as destabilizing cyber operations that violate internationally accepted norms of responsible state behavior in cyberspace.
"We call on Russia to stop these destabilising activities," the alliance said.
The alliance also emphasized that it has strengthened its cyber defenses in recent years by expanding its ability to integrate cyber capabilities into military operations and by improving coordination among member states.
The statement underscored that NATO intends to continue reinforcing its cyber posture in response to what it called Russia's ongoing cyber campaigns against both Allied nations and Ukraine.
"We will continue to strengthen our defences and stand united in our support for Ukraine," the statement said.
Cybersecurity has become an increasingly prominent component of NATO's collective defense strategy since Russia's full-scale invasion of Ukraine in 2022.
Alliance leaders have repeatedly warned that cyberattacks against critical infrastructure—including electric grids, communications networks, transportation systems, hospitals and government institutions—can have strategic effects comparable to conventional military operations.
NATO stopped short of announcing any new retaliatory measures Monday but reiterated that the alliance is prepared to use the "full range of capabilities" available to deter and counter cyber threats.
"We stand ready to employ the full range of capabilities in order to deter, defend against and counter the full spectrum of cyber threats," the North Atlantic Council said.
"We are prepared to respond to these at a time and in a manner of our choosing, in accordance with international law."