'Let's see if the old man has a sense of humor!': Howard Stern's longtime rival Gregg 'Opie' Hughes taunts fellow SiriusXM star by sneaking into his locked-down office 

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In his longtime feud with Howard Stern, Gregg 'Opie' Hughes might have overstepped his bounds - literally.

The SiriusXM host, 53, said his job as an on-air personality could be in jeopardy after he breached the King of All Media's sealed-off wing of the New York City building both broadcast out of last week, gaining access from a cleaning lady as he live streamed the proceedings on YouTube.

'We'll see if the old man has a sense of humor, cause I think it comes down to him,' Hughes said Tuesday in reference to the 63-year-old Private Parts star, who wields huge power with SiriusXM brass as the face of the company the past 11 years. 'The old man just has to go like that and its over, it's over for everybody.'

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On the rocks? Radio personality Gregg 'Opie' Hughes, 53, said his fate with SiriusXM could be in the hands of his longtime rival, Howard Stern, 63, after he convinced a cleaning lady to grant him access to Stern's sealed-off quarters at the company's New York City headquarters. Hughes (left) was snapped at an NYC film screening in 2014, while Stern was seen in Manhattan in 2013 

Behind enemy lines:  Hughes breached Stern's sealed-off compound in a clip he live streamed on YouTube 

Caught in the crossfire? Hughes told a cleaning lady that he had forgotten something inside the area, to which she granted him access to Stern's facility

Hughes said in a Facebook post: ‘I feel horrible about the cleaning lady and it wasn't right to get her involved,' noting that SiriusXM officials told him that 'her job was never in jeopardy'

Booted: Security quickly caught wind of the breach and asked Hughes and comedian Sherrod Small, seen here, to exit the premises

The incident made for a hot topic on Stern-centric online forums such as Radio Gunk, Dawgshed and Reddit, amid Hughes’s candid admission that his fate with the company might be up to his longstanding nemesis.

Hughes, who currently hosts The Opie Radio Show afternoons on SiriusXM’s Faction Talk channel, explained the course of events during his Tuesday broadcast alongside comedian Sherrod Small.

In the live stream on his YouTube account, Hughes took his online viewers on a tour of the lavish Big Apple broadcasting facility, trailed by Small and comic Vic Henley. As he progressed, Hughes eventually peered down a hall where Stern's since-abandoned fist emblem adorned the door.

Small, in reference to the animosity between the shock jocks, joked they had happened upon 'forbidden territory' and a 'No Opie zone,’ but that didn't dissuade Hughes from causing a bit of mischief.

Radio rivalry: Hughes said of his feud with Stern: 'I've been at fault over the years, but he's also been dirty.' Stern was snapped filming America's Got Talent in Hollywood in 2015

‘Let’s see if we can go in there, come on,’ Hughes said as he filmed his approach of the Stern compound, where a cleaning lady in front of the door tended to her job.

‘Can you let me in? I forgot something - you got a key?’ Hughes asked the worker, thanking her as she granted him access.

Henley told Hughes, ‘You’re gonna get in trouble,’ with Hughes responding, ‘Why am I gonna get in trouble? I’m just taking a look.’

Hughes made his way deep into Stern territory until he was summoned out of the area by security.

Henley told Hughes, ‘I hope that [cleaning] woman’ doesn’t get in trouble, to which Hughes responded, ‘Nah, she’ll be alright - she doesn’t speak English ... she’ll be alright.’

In the doghouse? Hughes (left) said he was 'yelled at for 45 straight minutes' by SiriusXM’s president & chief content officer Scott Greenstein (right) in the wake of the security breach. The satellite exec was snapped in December during the company’s Bon Jovi concert in Miami

On the air the next day, the broadcasting veteran of more than two decades joked he got 'a Stern talking to' from Scott Greenstein - SiriusXM’s president & chief content officer - amid the live streamed security breach.

‘Instead of preparing for the radio show today, I was getting yelled at for 45 straight minutes,’ he told Small of his tense pow-wow with Greenstein. ’They're talking about breaking and entering ... I might be fired, I might be fired.'

The Long Island native said that the executive told him that the incident was ‘out of his hands’ and under review in the company’s legal department.

‘He said, “They're not sure if you've been breaking into other offices,”’ Hughes said. ‘They're saying breaking and entering and I'm saying maybe a bit of trespassing.'

The radio host said he had a regrettable lapse in judgment in the incident.

‘Ah f---, I knew it was wrong! I knew it was wrong! I said that to [Greenstein], "I know it was wrong, I know” ... this might be a bad one. I didn't sleep last night, I knew, I was like, “F---, we went too far.”’

Hughes said he 'didn't think [the cleaning lady] would swipe' him into the area, adding that company officials reassured him that her position is safe.

'There are a------- out there thinking I was getting people fired and stuff - I'll be the one fired before they fire a cleaning lady, trust me,' he said. 'I do feel bad for the cleaning lady, I put her in a bad spot.'

All hail the king! Sirius employees made sure to clear the halls as the satellite star made his way into his wing of the building, as documented in a video Hughes recorded and posted to YouTube channel last fall

Wise-quack: Former co-host Artie Lange joked to Hughes that the scene with Stern and bodyguard Ronnie Mund 'looked a duckling got ahead of the mama duck'

Hughes illustrated how secure Stern’s fortress is in a YouTube clip he filmed last October. In it, he was stopped from entering the SiriusXM compound as Stern made his way to his studio. In the brief clip - titled, in part, ‘We're In Lockdown’ - security cleared the halls as Stern’s longtime security chief Ronnie Mund paced ahead of 6ft5 entertainer, who in the past had endlessly ridiculed radio adversaries such as Don Imus and Philadelphia-based John 'The Zookeeper' DeBella for demanding star treatment at their stations.

Hughes said Greenstein asked him why he has issues with Stern.

'I said, "This beef goes back so many f---ing years, but I'll sit down [with Stern] anytime - anytime, and I'll tell him to his face ... why," Hughes said. 'There's a lot of whys - I've been at fault over the years, but he's also been dirty.'

'I win, they lose': Stern told Sean Hannity in 2006 that he had persuaded radio executives with Infinity Broadcasting to prohibit Hughes and former partner Anthony Cumia from ever mentioning his name on their broadcasts. The radio rebel was snapped in LA in 2013

The animosity in question dates back nearly 20 years, when Stern and Hughes (with former co-host Anthony Cumia) both worked for Infinity Broadcasting: Stern with K-Rock, Hughes with WNEW.

Stern, a one-time poster-boy for free speech in his clashes with the FCC, used his clout with upper management, persuading them to forbid Hughes and Cumia from mentioning him on their broadcasts. Stern admitted the ploy in a March 2006 interview with Sean Hannity, who asked him why he would do such a thing as a supporter of free speech.

'I'm a strong supporter in my free speech,' Stern said, adding that he didn't mind being hypocritical in essentially censoring his opponents to protect his brand.

‘I win, they lose,’ he said, later telling a caller, ‘I believe in censoring anyone who is my enemy ... I believe in censorship when it benefits me.’

Yazoo! Stern's relentless attacks on Philadelphia-based John 'The Zookeeper' DeBella (right) in the 80s and 90s motivated Hughes and Cumia to fight back against the King of All Media, Hughes said

Hughes said he and Cumia took an aggressive approach in their early battles with Stern after seeing other radio personalities try to take the high road, only to wind up decimated by Stern's unrelenting attacks.

'We went at him because we were scared s---less [that] he was going to do to us what he did to every other radio show ... scared that he would take us out like he did DeBella and all those other shows,' Hughes revealed.

Small noted that Stern 'knocked people out of the [radio] business,' to which Hughes said, 'Yes, he did.'

Unwelcome: Former Stern Show intern Steve Grillo (left) revealed to Artie Lange a few weeks back that he'd been asked to leave the Stern compound by co-host Robin Quivers when remarks he made in a Periscope clip surfaced in an online news article

The incident involving Hughes might be particularly sensitive following recent reports of highly-restricted access to the Stern compound amid a rigid corporate culture - even among past show regulars often heard in replays on Stern’s two SiriusXM channels.

Former intern Steve Grillo spoke earlier this month with Stern's right-hand man of more eight years, Artie Lange, on the Artie Quitter podcast. He told Lange that on his most recent visit to the studio, he’d been informed by co-host Robin Quivers that he was banned from the premises and had to vacate the area immediately.

The reason: He’d ruffled feathers with remarks he’d made about the show in a Periscope clip that surfaced in a Radar story.

Opie & Artie: Lange has not appeared on Stern's show since his 2009 departure, but has sat in with Hughes on multiple occasions over the past year

Not his bro: Lange (left) envisioned a scenario in which Stern producer Gary ‘Baba Booey’ Dell'Abate (right) would pretend not to know who he was during a publicist's attempt to book him on the show. The former co-workers were snapped in NYC in 2006 

‘Can you imagine, you had to leave right now?' said the New Jersey native, who’s currently appearing on Judd Apatow’s new HBO comedy, Crashing. 'Listen to the madness going on over there - it’s a G**damn nightmare!’

In a subsequent podcast this week, Lange joked of a scenario in which Stern producer Gary ‘Baba Booey’ Dell'Abate pretended not to know who he was when a publicist tried to book him, Apatow and Crashing’s Pete Holmes on the show. Lange said the publicist told him, ‘When I said to Gary [that] Artie Lange is on [Crashing] too, he said, “Who?” ... he said he doesn’t know who you are. He also says Judd and Pete are not allowed to mention your name.’ 

Daily Mail has reached out to Hughes and Cumia for comment. 

Ex-Stern Show contributor says radio superstar sought 'to destroy' him 

No mincing words: The comedian took the stage in 2012 in Nyack, New York

'The Reverend' Bob Levy, a former Stern Show personality, told the Daily Mail that he believes Stern will push to have Hughes fired over the incident. Levy said that Stern ordered SiriusXM officials to ban him from the building - or from appearing on any of the company's other programs via phone - following his 2010 falling-out with the show. The 54-year-old comedian said Hughes and Cumia ignored decrees from the top and let him phone in to their show: 'They said, "F--- it, call in," and it was fun to talk to my friends.' Levy - who also co-hosted a show on Stern's channels called The Miserable Men Show - said of the radio icon: 'His plan was to destroy me but I keep coming back ... if he dares to f--- with me again, I will knock him out and his midget bodyguard,' presumably referring to Mund. Daily Mail has reached out to Stern for comment.