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CVE-2008-1522

19
FAUCET Score

CVE-2008-1522 describes a critical vulnerability in ZyXEL Prestige routers, specifically models P-660 and P-661 running firmware versions 3.40(AGD.2) through 3.40(AHQ.3). The vulnerability stems from the use of easily guessable default credentials: "user" for the "user" account and "1234" for the "admin" account. This allows unauthenticated remote attackers to gain unauthorized access to affected devices. With a CVSS score of 7.5 (High), this vulnerability poses a significant risk due to its low attack complexity (AC:L) and no authentication required (Au:N), enabling full compromise of confidentiality, integrity, and availability (C:P/I:P/A:P). The EPSS score is low, indicating a low probability of exploitation in the wild. Currently, there is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting a lack of widespread attention or exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
h-d1CPE matchmatch criteria
cpe:2.3:h:zyxel:prestige_660:h-d1:*:*:*:*:*:*:*
h-d3CPE matchmatch criteria
cpe:2.3:h:zyxel:prestige_660:h-d3:*:*:*:*:*:*:*
hw-d1CPE matchmatch criteria
cpe:2.3:h:zyxel:prestige_661:hw-d1:*:*:*:*:*:*:*
3.40CPE matchmatch criteria
cpe:2.3:h:zyxel:zynos:3.40:agd.2:*:*:*:*:*:*
3.40CPE matchmatch criteria
cpe:2.3:h:zyxel:zynos:3.40:agl.3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 49th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/41508
gnucitizen.org / projects/router-hacking-challenge
procheckup.com / Hacking_ZyXEL_Gateways.pdf
securityfocus.com / archive/1/489009/100/0/threaded