HOMEVULNERABILITIESCVE-2020-27651
HIGH

CVE-2020-27651

CWE-614Published: October 29, 2020· Updated: Jun 17, 2026

8.1
CVSS v3.1

Official Description

Synology Router Manager (SRM) before 1.2.4-8081 does not set the Secure flag for the session cookie in an HTTPS session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an HTTP session.

NVD Source

Technical Analysis

CVE-2020-27651 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

synology1 product(s)
router manager
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.synology.com/security/advisory/Synology_SA_20_14
ADVISORYhttps://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059
ADVISORYhttps://www.synology.com/security/advisory/Synology_SA_20_14
ADVISORYhttps://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059

All References (4)

→
https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
→
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059Exploit · Third Party Advisory
→
https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
→
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-27651
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-614
CISA KEVNo
Affected1 vendor(s)
PublishedOct 29, 2020

Related CVEs (CWE-614)

CVE-2025-8037
9.1
CVE-2026-53661
8.8
CVE-2026-46398
8.8
CVE-2025-53757
8.7
CVE-2025-0479
8.6
CVE-2025-52632
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27651 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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