CVE-2020-27858Network attack vector

Information disclosure via getNews external entity expansion

Published Jan 20, 2021 · Updated Aug 4, 2024

XXE in the getNews method in Arcserve CA ARCserve D2D 16.5 allows remote attackers to read SYSTEM-accessible data via crafted XML. The parser resolves an attacker-supplied external-entity URI and embeds the retrieved content into the XML document processed by getNews. No authentication or user interaction is required, and disclosure is limited to data reachable by the service's SYSTEM context.

CVSS severity7.5
High
EPSS probability73.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in the getNews method in Arcserve CA ARCserve D2D 16.5 allows remote attackers to read SYSTEM-accessible data via crafted XML. The parser resolves an attacker-supplied external-entity URI and embeds the retrieved content into the XML document processed by getNews. No authentication or user interaction is required, and disclosure is limited to data reachable by the service's SYSTEM context.

The record

CVE
CVE-2020-27858
Published
Jan 20, 2021
Updated
Aug 4, 2024
Vendor
Arcserve
Product
CA ARCserve D2D
Classifications
CWE-611, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=16.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Arcserve · CA ARCserve D2Dversion=16.5

Published CVSS scores

7.5Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference ('XXE')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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