Israel expected its campaign against Iran to severely damage Tehran’s military capabilities for years. Now, according to new Israeli reporting, officials inside both the IDF and Mossad are surprised by just how quickly Iran appears to be rebuilding.
The Jerusalem Post reports that Israeli defence and intelligence officials have been stunned by the pace of Iran’s post-war military recovery, particularly when it comes to ballistic missiles and the infrastructure needed to produce and deploy them.
The concern is no longer simply about how many missiles Iran has left.
It is increasingly about how quickly Iran can replace them.
Israel expected a much longer setback
During the war, Israeli and US strikes targeted missile production facilities, launch sites, military infrastructure and other strategic locations across Iran.
The expectation inside Israel was that some of this damage would take years to overcome.
But that assumption is now reportedly being challenged.
According to the Jerusalem Post, Israeli officials are seeing a surprisingly rapid turnaround in areas connected to Iran’s ballistic missile program.
That matters because ballistic missiles remain one of Iran’s most important conventional weapons and a central part of its deterrence strategy against Israel and the United States.
If Tehran can manufacture replacements faster than previously calculated, the long-term effect of the strikes may be considerably different from what Israeli planners originally expected.
Underground facilities are part of the problem
Iran has spent decades building military infrastructure underground, including missile storage facilities and tunnel networks buried deep inside mountainous areas.
Destroying entrances, roads and above-ground infrastructure can temporarily disable these sites.
But it does not necessarily mean everything stored deep underground has been destroyed.
Recent satellite imagery examined by international media has shown Iran repairing roads, reopening tunnel entrances and rebuilding military and industrial sites damaged during the conflict.
The Wall Street Journal reported in July that reconstruction was taking place at missile bases, industrial facilities, ports and other strategic sites.
That broader evidence supports the concern now being reported inside Israel: Iran may be recovering faster than expected.
The missile production question
One of the biggest issues is production.
A country does not need to restore every damaged military site to remain dangerous if it can rapidly replenish the weapons it considers most important.
Iran has invested heavily in ballistic missiles precisely because they allow Tehran to threaten targets far beyond its borders without relying on a modern air force.
Israeli intelligence therefore has to calculate not only the number of missiles Iran currently possesses, but its production rate, access to components, surviving factories and the amount of equipment that may have remained protected underground.
If those calculations were too optimistic after the war, Israel could be facing a much shorter window before Iran rebuilds a significant portion of its arsenal.
Iran has surprised Israel before
This is not the first time Iran’s missile program has recovered faster than Israeli assessments anticipated.
After Israeli strikes damaged Iranian missile-production facilities in 2024, there were predictions that important parts of the program could be set back for a considerable period.
Iran nevertheless continued rebuilding.
Satellite imagery following the 2025 Israel-Iran conflict also showed reconstruction activity at missile-related facilities, demonstrating Tehran’s determination to restore capabilities following major attacks.
The latest Israeli concerns therefore appear to reflect something larger than a single repaired missile base.
They raise questions about whether Iran’s industrial resilience has repeatedly been underestimated.
But “Mossad stunned” needs context
There is an important distinction.
Mossad has not issued a public statement declaring that it is “stunned” by Iran’s recovery.
That description comes from Jerusalem Post reporting based on Israeli defence and intelligence sources.
The underlying claim should therefore be treated as a reported Israeli intelligence assessment rather than an official public announcement from Mossad itself.
What can be independently observed is that Iran has been rebuilding damaged infrastructure, including missile-related sites, and that the speed of reconstruction has attracted attention well beyond Iran itself.
Why this matters now
The speed of Iran’s recovery could influence almost every major calculation in the region.
If Israel believes Iran is rapidly rebuilding its missile arsenal, pressure could grow for further military action before that recovery is complete.
Iran, meanwhile, has every reason to demonstrate that months of strikes failed to permanently remove its ability to threaten its enemies.
That creates a dangerous cycle.
The faster Iran rebuilds, the greater the pressure on Israel to consider stopping it.
And the more Israel threatens further strikes, the more incentive Iran has to disperse, conceal and accelerate its military production.
For years, the confrontation between Israel and Iran was largely fought through intelligence operations, cyberattacks and regional proxy forces.
The wars of the past two years have transformed that calculation.
Both sides now know direct conflict is possible.
The bigger question
The latest reports do not mean Iran has completely restored everything it lost during the war.
Major military infrastructure was damaged, equipment was destroyed and some capabilities could still take substantial time to replace.
But the reported speed of the recovery is significant because it challenges one of the assumptions behind large-scale strikes: that destroying enough infrastructure can buy years of strategic breathing room.
Iran may be showing that rebuilding military capability can happen much faster than destroying it permanently.
And if Israeli intelligence is genuinely being surprised by the speed of that recovery, the most important question may not be how much damage was inflicted on Iran.
It may be how long that damage actually lasted.