Tareha was on parole at the time the assaults took place and had been interviewed by the Parole Board the day before the attacks.
He was sentenced in February 2011 to three years and nine months' jail after forcing his way into the home of a 68-year-old woman, confronting her in her bedroom and robbing her of a small amount of money.
He was released on parole on July 22, last year.
A Parole Board decision, written the day before the November assault, said Tareha had complied well with his conditions of parole since his release.
"He has been attending counselling ... and he has had two whanau hui with his probation officer and with family members.
The board was "pleased with his performance" and said Tareha was "motivated to make changes".
However, even before his 2011 sentence, Tareha had a history of targeting female victims in their homes, and on February 1, 2008, he followed a young exchange student back to her Napier house and broke in while she slept.
He was found and arrested by police after the student's hosts awoke to find Tareha in a bedroom.
The then 24-year-old Tareha was found guilty by a jury of entering the house with the intention to commit a crime and was sentenced to 20 months' jail.
At sentencing, his former lawyer attempted to argue his client was not a "sexual predatory type" and there was no evidence to suggest he was intent on carrying out any sexual offence.
On May 24, 1994, a chillingly similar crime to Tareha's occurred when Turoa Junior Hapi, also on parole, raped, robbed and knifed a 78-year-old woman at her Bridge Pa home.
Justice Andrew McGechan noted during Hapi's sentencing, that the attack on the elderly widow came just four months since he had been released from jail after serving two and a half years of a four-year term for the sexual violation of two young girls.
Hapi, aged 26 at the time, was sentenced to preventive detention, and a minimum of 15 years in jail, for rape and wounding with intent. It was the first sentence of its type under changes to the Criminal Justice Act.
Sensible Sentencing Trust national spokesperson Garth McVicar said Tareha's attacks were just one of a number of cases in which offenders had committed "hideous offences" while on parole.
"The current system is an absolute travesty ... we support victims and it is horrific to watch what it does to them when these offenders are granted parole.
"Too many offenders are re-offending, and from a victim's perspective it appears the system has been set up to torment them."
The decision process to grant Tareha parole was a "debacle".
"If he was able to pull the wool over the eyes of that Parole Board just a day before he went on to commit those crimes then it's just an absolute disgrace."
