CVE-2020-27658
HIGHDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Exploit Intelligence
Moderate risk: more likely to be exploited than 68% of all known CVEs.
References
Related Vulnerabilities
Other CWE-1004 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2025-27223 | High | 7.5 | 2.1% | - | - |
| CVE-2021-42115 | High | 8.1 | 1.2% | - | - |
| CVE-2019-8283 | Medium | 6.5 | 1.2% | - | Fix |
| CVE-2021-3706 | High | 7.5 | 1.1% | - | Fix |
| CVE-2022-25172 | Medium | 6.1 | 1.0% | - | - |
| CVE-2021-39210 | Medium | 6.5 | 1.0% | - | Fix |
Common questions
How do I fix CVE-2020-27658?
Upgrade router manager to 1.2.4-8081 or later.
Is CVE-2020-27658 being actively exploited?
Not that we know of. CVE-2020-27658 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.3% is the estimated probability that it will be exploited in the next 30 days. That is higher than 68% of all scored CVEs.
How severe is CVE-2020-27658?
CVE-2020-27658 has a CVSS v3 base score of 7.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-27658 affect?
Published advisories record a fix for router manager (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2020-27658
Markdown
[](https://tridentstack.com/cve/CVE-2020-27658)HTML
<a href="https://tridentstack.com/cve/CVE-2020-27658"><img src="https://tridentstack.com/cve/badge/CVE-2020-27658.svg" alt="CVE-2020-27658"></a>Find and fix vulnerabilities across your fleet
TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.