Actually the article
http://www.sourcesec.com/Lab/dlink_hnap_captcha.pdf from SourceSec Security Research states:
"Affected Products
It is suspected that most, if not all, D-Link routers manufactured since 2006 have HNAP support and
are vulnerable to one of the below described vulnerabilities. However, only the following routers and
firmware versions have been confirmed to date:
1) DI-524 hardware version C1, firmware version 3.23
2) DIR-628 hardware version B2, firmware versions 1.20NA and 1.22NA
3) DIR-655 hardware version A1, firmware version 1.30EA"
While the ComputerWorld article says:
"D-Link and SourceSec differed over which models were vulnerable. SourceSec wrote that it suspected that all D-Link routers made since 2006 with HNAP support were affected, but they said they had not tested all of them.
D-Link said the models affected are the DIR-855 (version A2), DIR-655 (versions A1 to A4) and DIR-635 (version B). Three discontinued models -- DIR-615 (versions B1, B2 and B3), DIR-635 (version A) and DI-634M (version B1) -- are also affected.
The company said new firmware updates are being made available across its Web sites."
Clearly it would help if D-Link clears up the issue.