CVE-2020-27658: synology router_manager Sensitive Cookie Without 'HttpOnly' Flag
Vulnerability summary
CVE-2020-27658 is a high (CVSS 7.1) Sensitive Cookie Without 'HttpOnly' Flag vulnerability in synology router_manager. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.2% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 29-10-2020PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
Synology Router Manager (SRM) before 1.2.4-8081 does not include the HTTPOnly flag in a Set-Cookie header for the session cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST6.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NDiffers
EPSS trend
Probability
1.31%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
0.00 pp
From 1.31% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (talosintelligence.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-1004Sensitive Cookie Without 'HttpOnly' FlagThe product uses a cookie to store sensitive information, but the cookie is not marked with the HttpOnly flag.
- CWE-732Incorrect Permission Assignment for Critical ResourceThe product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.
Affected systems
Synology2 products
- router_manager≥ 1.2, < 1.2.4-8081
- synology router manager (srm)≥ unspecified, < 1.2.4-8081
1 vendor · 2 products
References
2 links- www.talosintelligence.com/vulnerability_reports/TALOS-2020-1086X Refsource MISCExploitThird Party Advisory